Upload
zunaira-noreen
View
225
Download
0
Embed Size (px)
Citation preview
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 1/43
1. The temperature at which centigrade scale is equal to 0° is __________.
(-32°, -40°, 100°, -23°!
2. The a"erage #.$ o% a molecule o% a per%ect gas is __________.
(1&3#T, 3&2#T, 2&3#T!
3. The internal energ' in an isothermal process __________.
(ecreases, )ncreases, *ecomes +ero!
4. The electric intensit' at an' point *etween two oppositel' charged plain sheets is
__________.
(s&3o, s&o, s&2o, 2s&o!
. __________ o% the two charged particles o% the same mass will *e de%lected mostin a magnetic %ield.
(ast /o"ing, low mo"ing!
. To increase the accurac' o% a potentiometer __________ should *e used.
( uni%orm wire o% a large length should *e used, uni%orm wire o% a small length,on-uni%orm wire!
. $insteins Theor' o% 5elati"it' states that the speed o% light in "acuum is __________.
()ndependent o% the motion o% the source and the o*ser"er, a%%ected *' either dri%t,dependent on the motion o% the source and the o*ser"er!
6. )% a su*stance contracts on %ree+ing the increase o% pressure __________ the%ree+ing point.
()ncreases, ecreases, oes not 7hange!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 2/43
8. thermo%las9 contains hot tea. )t is sha9en rapidl', i% the tea is considered asthe s'stem then its temperature will __________.
(5emains the same, 5ise, all!
10. )% the temperature o% the cold *od' is decreased the e%%icienc' o% a carnotengine __________.
(ecreases, )ncreases, 5emains constant!
11. The electric potential is +ero __________.
()nside a conductor, /idwa' *etween an' two charges o% the opposite signs, /idwa'
*etween two equal charges o% the sme sign!
12. :hen an electron mo"es in a magnetic %ield ;< with "elocit' ;= the %orce actingon it is perpendicular to __________
(= *ut not to <, *oth = and <, < *ut not =!
13. )% an electron and proton enter into a magnetic %ield with the same "elocit', theelectron shall e>perience a&an __________ %orce than the proton.
(?reater, @esser, $qual!
14. The wa"elength o% a material particle o% mass m mo"ing with the "elocit' " isgi"en *'A
(l B hn&m, lB h&m", l B m&hn!
1. gas e>erts pressure on the walls o% the containing "essel *ecause __________.
()t possesses momentum, the gas molecules collide with each other, the gas has %inite"olume!
1. The magnitude o% an electric %ield does not depend upon __________.
(The distance %rom the charged particle, nature o% the charges causing the %ield, the
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 3/43
magnitude o% the charges causing the %ield!
1. Two parallel *eams o% electrons mo"ing in the same direction will __________.
(5epel each other, ttract each other, either attract nor repel each other.
16. To increase the accurac' in a potentiometer circuit __________ should *e used.
( wire o% a small length, wire o% a large length, non uni%orm wire!
18.:hen %ast mo"ing electrons are stopped *' a metal o% high atomic weight thephenomenon gi"es rise to __________.
(C-ra's, *-ra's, g-ra's!
20. The pressure and "olume %ormula o% a gas undergoing and an dia*atic 7hange is __________.
(D= Bconstant, Dr= B constant, (D=!rB constant, D=r B constant!
21. %ree electron in an electric %ield __________.
(remains stationar', mo"es %rom the higher potential to the lower potential, mo"es%rom the lower potential to the higher potential!
22. n electron and a proton with the same momentum enter perpendicularl' into auni%orm magnetic %ield __________.
(<oth particles will de%lect equall', the proton will de%lect more than the electron,the electron will de%lect less than the proton!
23. $insteins photoelectric equation is written as __________.
(1&2 m"2ma> B hn E %o, hn B %o.- 1&2 m"2ma>, hn B 1&2 m"2ma> E %o, one o%these!
24. orce *etween two similar point charges separated *' a distance ;r is . )% thedistance is dou*led, %orce *ecomes __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 4/43
(, 2, 4, &4!
2. /ean translational 9inetic energ' per molecule o% an ideal gas is gi"en *'
__________.
(3#T, 2&3#T, 3&2#T!
2. Drocess in which there is no heat e>change is called __________ Drocess.
()sothermal, )sochoric , dia*atic, )so*aric!
2. pectral series o*tained due to transition o% electron %rom higher to 3rd or*it is
called __________.
(@'man eries, <almer eries, <rac9ett eries, Daschen eries!
26. *atter' o% e.m.% "olts has internal resistance r ohm, current ) is drawn %romit its terminal "oltage = will *e __________.
(= B $ F )r, = B $&r, = B )r, = B $&)!
28. $lectric intensit' o% a gi"en charge at an' point is __________ distance %romcharge.
(irectl' proportional to, )n"ersel' proportional to square o%, irectl' proportional tosquare o%, )n"ersel' proportional to square o% !
30. Two resistors o% 2: and 3: are connected in series with a *atter' o% 10 "olts.Dotential di%%erence across 2: resistor will *e __________.
( "olt, 4 "olt, "olt, 10 "olts!
31. sla* o% certain dielectric is placed *etween two oppositel' charge plates. Theintensit' *etween plates __________.
(ecreases, )ncreases, 5emains constant!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 5/43
32. orce on a charged particle mo"ing in a magnetic %ield is gi"en *' the equation B q"*sinq. Guantities mutuall' perpendicular are __________.
(= and <, and ", and <, one!
7hapter 1
Heatriendsmania.net1. The energ' that %lows %rom a high temperature o*Iect to a low temperatureo*Iect is called __________.
(Heat, ound $lectricit', olar $nerg'!
2. Hotness or coldness o% an o*Iect is e>pressed in tems o% a quantit' called __________.
(Heat, Temperature, #el"in, one o% these!
3. The ) unit o% heat is __________.
(7alorie, Joule, $lectron =olt, one o% these!
4. The energ' e>pended when a %orce o% one ewton mo"es an o*Iect one metre inthe direction in which the %orce is applied is called __________.
(7alorie, Joule, 9wh, $lectron =olt!
. 1JB__________.
(1m, 19gms2, 19gm-2,19gm2s-1!
. 1J B __________.
(9gms, 1 9gms2, 19gm2s-2, 19gm2s-1!
. The a"erage 9inetic energ' o% the molecules o% the o*Iect is called its __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 6/43
(Heat, Temperature, Hotness, 7oldness!
6. __________ is a de"ice used to measure the degree o% hotness or coldness o% the
o*Iect.
(Thermometer, <arometer, H'psometer, one o% these!
8. ?enerall' thermometers ma9e use o% the %act that most o% the liquids __________ on heating.
(7ompress, $>pand, $"aporate, u*limi+e!
10. Kn 7elsius scale *oiling point o% water is ta9en as __________.
(0°7, 100°7, 160°7, one o% these!
11. Kn 7elsius scale %ree+ing point o% water is ta9en as __________.
(0°7, 100°7, 160°, one o% these!
12. 1°7 B __________.
L&8 (° F 32!, &8 (° E 32!, &8 (° F 23!, &8 (° E 23!M
13. 1° B __________.
L&8 (°7 F 32!, &8 (° E 32!, 8& (°7 E 32!, one o% theseM
14. # B __________.
(23 E °7, 23 - °7, 23 E °, 23 - °!
1. 1 cal B __________.
(11.164J, 2.164J, 3.164J, 4.164J!
1. __________ proposed that matter and energ' are equi"alent.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 7/43
(ewton, $instein, /a>well, ll the these!
1. The equation representing the intercon"ersion o% matter and energ' is written as
__________.
($ B mc, $ B mc2, $ B mc3, ll o% these!
16. 7on"ersion o% one gram o% matter to energ' 'ields __________ Ioules o% energ'.
(8 > 1013J, 8 > 1012J, 8 > 1011J, 8 > 1010J!
18. The amount o% heat required to raise the temperature o% 2.0 > 1069g o% water
%rom 0°7 to 100°7 is equal to __________.
(8 > 1013J, 8 > 1012J, 8 > 1011J, 8 > 1010J!
20. uring the com*ustion o% 3 > 10 9g o% coal __________ o% matter is con"ertedinto energ'.
(1g, 19g, 1mg, one o% these!
21. The temperature at which the gases i% the' remain in gaseous state e>ert +eropressure and ha"e +ero "olume is called __________.
(1°7, 1°, 1#, *solute Nero!
22. The sum total o% all the energ' o% all the molecules o% atoms in an o*Iect is9nown as __________.
(Temperature, $ntrop', )nternal $nerg', one o% these!
23. Knce the heat is trans%erred to an o*Iect, it is con"erted into the __________.
($ntrop' o% the o*Iect, )nternal energ' o% the o*Iect, Temperature o% the o*Iect,one o% these!
24. OTemperature remaining constant the "olume o% gi"en mass o% a gas is in"ersel'
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 8/43
proportional to the pressure applied on it.P )t is called __________.
(?eneral ?as @aw, <o'les @aw, 7harles @aw, one o% these!
2. Ot constant pressure the "olume o% a gas is proportional to the a*solutetemperature.P )t is called __________.
((?eneral ?as @aw, <o'les @aw, 7harles @aw, one o% these!
7hapter 12
$lectrostatics
1. /atter is composed o% three %undamental particles. The' are __________.
(a. $lectrons, Drotons, eutrons *. $lectrons, 7athode ra's, masons c. $lectrons,neutrons, masons!
2. __________ is a negati"el' charged particle and is %ound around the nucleus o% anatom.
($lectron, Droton, eutron, one o% these!
3. __________ is a positi"el' charged particle and is %ound in the nucleus o% anatom.
($lectron, Droton, eutron, one o% these!
4. __________ is a neutral particle and is %ound in the nucleus o% an atom.
($lectron, Droton, eutron, one o% these!
. :hen one or more than one electrons are remo"ed %rom an atom it *ecomes __________.
(eutral particle, egati"el' charged particle, positi"el' charged particle, none o%these!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 9/43
. ll material o*Iects are composed o% __________.
(($lectron, Droton, eutron, atoms!
. tom is a __________.
(7harged particle, egati"el' charged particle, Dositi"el' charged particle, one o%these!
6. )% electrons are added in an atom it *ecomes __________.
(eutral particle, egati"el' charged particle, positi"el' charged particle, none o%these!
8. Those material o*Iects which do not allow the charge or electric current to passthrough them are called __________.
()nsulators, 7onductors, emi-conductors, none o% these!
10. Those material o*Iects which allow charge or electric current to pass throughthem are called __________.
()nsulators, 7onductors, emi-conductors, none o% these!
11. @i9e charges __________.
(ttract each other, 5epel $ach other, either attract nor repel each other, oneo% these!
12. Qnli9e charges __________.
(ttract each other, 5epel $ach other, either attract nor repel each other, oneo% these!
13. )% the ph'sical si+e o% a charge particle is "er' small, compared to theseparation distance *etween them, it is called __________.
(Nero charge, Doint charge, Dositi"e charge, egati"e charge!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 10/43
14. OThe magnitude o% the electrostatic %orce *etween two point charges is directl'proportional to the product o% the magnitude o% the charges and in"ersel' proportionalto the square o% the distance *etween them.P )t is called __________.
(arada's law, 7oulom*s @aw, ewtons @aw, ?uasss law!
1. o is called __________.
(cceleration due to gra"it', ?ra"itational constant, pring constant, Dermiti"it' o%%ree space!
1. )% the quantit' o% charge on each o% the two *odies is dou*led, the %orce
*etween them *ecomes __________.
(Twice, our times, ine times, i>teen times!
1. __________ is a "ector quantit'.
($lectric %ield, $lectric ield )ntensit', $lectric charge, $lectric current!
16. )n ) units electric %ield intensit' is measured in __________.
(s, &7, &J, &m!
18. The concepts o% electric %ield lines was introduced *' a %amous scientist __________
(ewton, arada', $instein, 7oulom*!
20. The electric %ield lines, alwa's start %rom a __________.
(Dositi"e charge, egati"e charge, Doint charge, one o% these!
21. The electric %ield lines, alwa's end at a __________.
(Dositi"e charge, egati"e charge, Doint charge, one o% these!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 11/43
22. The tangent to the %ield line at an' point gi"es the direction o% the __________.
(electric %ield intensit' at that point, electric %ield at that point, $lectrostatic %orce
at that point, $lectrostatic %orce at that point, one o% these!
23. The wor9 done in *ringing a unit positi"e charge %rom in%init' to certain point,9eeping the unit charge is equili*rium is called __________.
(Dotential energ', Dotential gradient, $lectric potential, $lectric %ield intensit'!
24. )n ) units electric potential is measured in __________.
(7oulom*s, mperes, =olts, &72!
7hapter 13
7urrent $lectricit'
1. The net charge %lowing across the sectional area per unit time is 9nown as __________.
($lectric 7urrent, mpere, $lectric %low, none o% these!
2. The direction o% electric current is that in which __________.
(egati"e charge will dri%t, Dositi"e charge will dri%t, <oth positi"e and negati"echarge will dri%t, one o% these!
3. /athematicall' $lectric current ) in a conductor is de%ined *' the relation __________.
() B Gt, G B )&t, ) B G&t, one o% these!
4. The ) unit o% current is __________.
(mpere, 7oulom*, "olt, one o% these!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 12/43
. 1 B __________.
(17&s, 17&s2, 1J&s, 1&s!
. O)n a electrical circuit, the potential di%%erence across a conductor is directl'proportional to the current %lowing through it, pro"ided the temperature o% theconductor remains the same.P This is called __________.
(Khms @aw, 7oulom*s @aw, ?uasss @aw, one o% these!
. /athematicall' Khms @aw is written as __________.
(= B )5 = B )&5, = B Gt, one o% the a*o"e!
6. /easure o% the opposition to the %low the %ree electron is 9nown as __________.
(7urrent, 5esistance, 7onductance, 7apacitance!
8. The ) unit o% electrical resistance is __________.
(mpere, =olt, arad, Khm!
10. )% the potential di%%erence o% 1 "olt is applied across the end o% a conductor andthe resulting current %lowing through the conductor is one ampere then the resistanceo% the conductor is said to *e __________.
(1ohm, 1ampere, 1%arad, 1"olt!
11. 1: (ohm! B __________.
(1=, 1=&, 17&, 1J&2!
12. )t is e>perimentall' o*ser"ed that in general the resistance 5 o% a gi"en wireincreases with increase in __________.
(Temperature, 7ross-section area o% a wire, @ength o% a wire, none o% these!
13. )t is e>perimentall' o*ser"ed that in general the resistance 5 o% a gi"en wire
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 13/43
decreases with increase in __________.
(Temperature, 7ross-section rea, @ength o% a wire, one o% the a*o"e!
14. The change in resisti"it' per unit original resisti"it' (or resistance! per degreechange in temperature is called __________.
(5esistance, 7onductance, Temperature coe%%icient o% resisti"it', ll o% these!
1. The resisti"it' o% a class o% elements o% some critical temperature T, %alls to+ero. The materials showing such propert' are called __________.
(emi-conductors, uper-conductors, )nsulators, 7onductors!
1. The de"ice which can maintain a potential di%%erence *etween two points to whichthe' are attached are 9nown as __________.
(r' cell, sources o% power, sources o% electromoti"e %orce, sources o% heatdissipated!
1. The unit o% electromoti"e %orce is __________.
(=olt, mpere, watt, Joule!
16. <atteries or cells con"ert __________.
(Heat energ' into electrical energ', nuclear energ' into electrical energ', 9ineticenerg' into electrical energ', chemical energ' into electrical energ'!
18. $lectrical generators con"ert __________.
(chemical energ' into electrical energ', 9inetic energ' into electrical energ',mechanical energ' into electrical energ', light energ' into electrical energ'!
20. Thermocouples con"ert __________.
(chemical energ' into electrical energ', heat energ' into electrical energ', mechanicalenerg' into electrical energ', light energ' into electrical energ'!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 14/43
21. Dhoto "oltaic cell con"erts __________.
(chemical energ' into electrical energ', heat energ' into electrical energ', mechanical
energ' into electrical energ', light energ' into electrical energ'!
22. )n practice, the sources o% em% alwa's ha"e __________.
(Nero resistance, unit resistance, some resistance, in%inite resistance!
23. The em% o% a source is equal to the potential di%%erence across the terminals o%the source when either its internal resistance is __________.
(Nero, )n%inite, Nero or in%inite, one o% these!
24. The electromoti"e %orce is written as __________.
($ B :&q, $ B :q, $ B G&), one o% these!
7hapter 14
/agnetism and $lectromagnetism
1. /agnetism deri"es its name %rom __________, a region in sia /inor (/odernTur9e'! where it was %ound in %or %orm o% certain iron core.
(/agnesia, /agnesium, $lectromagnetism, one o% these!
2. __________ is not a magnetic material.
()ron, ic9er, 7o*alt, sil"er!
3. *od' that attracts small pieces o% iron and points towards north-south directionwhen suspended %reel', is called a __________.
(/agnet, 7onductor, /agnetism, one o% these!
4. @i9e poles o% two magnets __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 15/43
(ttract, 5epel, either attract nor repel, one o% these!
. Qnli9e poles o% two magnets __________.
ttract, 5epel, either attract nor repel, one o% these!
. The magnetism o% the magnet is concentrated in the __________.
(orth pole, outh pole, orth and outh pole, t the middle!
. )% a magnet is *ro9en into two pieces, then __________.
(Two magnets are o*tained, oth pole is o*tained, outh pole is o*tained, Kne northpole and one south pole is o*tained!
6. The space surrounding a magnet in which its magnetic e%%ect is %elt is called __________.
(orth pole, south pole, /iddle Doint, /agnetic ield!
8. The intensit' o% the magnetic %ield near its poles is __________.
(Nero, /a>imum, /inimum, one o% these!
10. )% the magnetic %ield is uni%orm, then the magnetic lines o% %orces are __________.
(7ur"ed, Darallel, Derpendicular, one o% these!
11. The magnetic %ield is represented with __________.
(/agnetic lines o% %orces, /agnetic induction, orth pole, outh pole!
12. The path along which an isolated north ple o% a magnet mo"es in the magnetic%ield is called __________.
(/agnetic %ield, /agnetic %ield lines, orth pole, outh pole!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 16/43
13. Two magnetic lines o% %orce __________.
(can intersect each other, do not intersect each other, can repel each other, can
attract each other!
14. __________ *eha"e li9e a stretched ru**er string which tends to contractlongitudinall' and e>pand laterall'.
(/agnets, /agnetic orce, $lectric @ines o% %orce, /agnetic lines o% %orce!
1. The magnetic lines o% %orce pass through __________, as compared to air.
(:ater, )ron, 5u**er, one o% the a*o"e!
1. su*stance which *eha"es li9e a magnet in the presence o% a strong %ield iscalled __________.
(/agnets, erromagnets, $lectromagnets, one o% these!
1. magnet can *e demagneti+ed *' __________.
(Heating, <' dropping it se"eral time, *rea9ing into two pieces, *oth heating and *'dropping it se"eral time!
16. The %ield magnet around a mo"ing charge is called __________.
($lectric ield, /agnetic ield, ?ra"itational ield, one o% the a*o"e!
18. The direction o% magnetic lines o% %orce is gi"en *' the __________.
(head to tail rule, right hand rule, le%t hand rule, none o% these!
20. __________ was the %irst to note the presence o% magnetic %orce in a wire inwhich currents are %lowing.
(ewton, mpere, Kersted, one o% these!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 17/43
21. )% two wires in which currents are %lowing in the same direction are placedparallel and close to each other then the' will __________.
(5epel each other, ttract each other, either attract nor repel each other, one
o% the a*o"e!
22. )% two wires in which currents are %lowing in the opposite direction are placedparallel and close to each other then the' will __________.
(5epel each other, ttract each other, either attract nor repel each other, oneo% the a*o"e!
23. The charge mo"ing parallel to the magnetic %ield ;< with a certain "elocit' ;"
e>periences __________.
(o %orce, /a>imum %orce, /inimum orce, one o% these!
24. The charge mo"ing perpendicular to the magnetic %ield ;< with a certain "elocit';" e>periences __________.
(o %orce, /a>imum %orce, /inimum orce, one o% these!
2. The magnetic %orce m acting on charge ;q when it mo"es with a "elocit' ;"through a magnetic %ield ;< is gi"en *' __________.
(m B q" > <, m B q"2 > <, m B q$, one o% these!
2. The magnitude o% a magnetic %orce ; acting on charge ;q when it mo"es with a"elocit' ;" through a magnetic %ield ;< is gi"en *' __________.
( B q"<sinq, B q"2<sinq, "<sinq, one o% these!
2. )n a magnetic %ield the charge at rest e>periences __________.
(o %orce, /a>imum %orce, /inimum %orce, one o% these!
26. The charge, which mo"es along a line parallel to the direction o% magnetic lines o%%orce, e>periences __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 18/43
(o %orce, /a>imum %orce, /inimum %orce, one o% these!
28. /a>imum %orce is e>perienced *' a charged particle when it mo"es __________.
(Darallel to magnetic %ield, with +ero "elocit', none o% these!
30. The ) unit o% magnetic induction < is __________.
(=olt, watt, %arad, tesla!
31. :hen an alternating accelerating %ield is applied to a charge it produces __________.
(ound wa"es, $lectromagnetic wa"es, C-ra's, ?amma ra's!
32. The wa"e which require no medium %or the propagation are 9nown as __________.
(ound wa"es, /echanical wa"es, $lectromagnetic wa"es, one o% these!
33. n electromagnetic wa"e electric and magnetic %ields are __________.
(Darallel to each other, Derpendicular to each other,Kpposite to each other, one o%these!
34. The "elocit' o% electromagnetic wa"es depend upon __________.
(/agnetic permea*ilit', $lectricpermiti"it', <oth magnetic permea*ilit' and electricpermiti"it', one o% these!
3. u*stances ha"ing electrical resisti"it' intermediate *etween conductors andinsulators are called __________.
(uperconductors, emiconductors, n-t'pe conductors, p-t'pe conductors!
3. )n emiconductors __________ are responsi*le %or electrical conduction.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 19/43
(Drotons, $lectrons, Holes, $lectrons, holes!
3. :hen a penta"alent material li9e s, is added to tetra"elent material i.e. ?e weget a __________.
(n-t'pe material, p-t'pe material, emiconductors, one o% these!
36. )n n-t'pe materials __________.
(Holes are maIorit' carriers, $lectrons are maIorit' carriers, $lectrons are minorit'carriers, one o% these!
38. :hen a tri"alent material li9e )ndium or ?alium is added to ?e, we get a
__________.
(n-t'pe material, p-t'pe material, semiconductor, one o% these!
40. )n p-t'pe materials __________.
(Holes are maIorit' carriers, $lectrons are maIorit' carriers, $lectrons are minorit'carriers, one o% these!
41. =elocit' o% light is __________.
(3 > 106 m&s, 3 > 10 m&s, 3 > 10 cm&s, one o% these!
42. The electromagnetic wa"es emitted *' the ).7 circuit o% aerial o% a transmittingstation are o% __________.
(Nero amplitude, Qnit amplitude, 7onstant amplitude, =aria*le amplitude!
43. The electromagnetic wa"es emitted *' the ).7 circuit o% aerial o% a transmittingstation ha"e %requenc' o% the range __________.
(102H+, 104H+, 10H+, 106H+!
44. cr'stal diode is used %or recti%ication o% __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 20/43
(7 current, 7 current, $lectromagnetic wa"es, one o% the a*o"e!
4. geometric shape o% a solid o*tained *' regular, repetiti"e, three-dimensionalarrangements o% its molecules, atoms or ions is called a __________.
(7r'stal, @attice, 7r'stal plane, one o% these!
4. Two su*stances ha"ing the same cr'stal structure are called __________.
()somorphous u*stance, llotropic su*stances, True su*stances, Dol'morphoussu*stances!
4. The su*stance, which e>ists in two or more cr'stal %orms under di%%erent
condiion is called __________.
()somorphous u*stance, llotropic su*stances, True su*stances, Dol'morphoussu*stances!
46. regular, repetiti"e, three-dimensional pattern o% points, which represent theposition o% molecules, atoms or ions in the cr'stal, is called __________.
(Qnit cell, pace lattice, cr'stal, true su*stance!
48. The smallest portion o% a cr'stal lattice that i% repeated in three-dimensions willgenerate the entire lattice is called __________.
(Qnit cell, @attice plane, cr'stal, none o% these!
0. :hen a cr'stal is su*Iected to stress, it tends to *rea9 or %racture alongde%inite direction which is characteristic o% a sample. This is called __________.
(7lea"age, llotrop', nisotrop', Homeogeneit'!
1. The propert' due to which the si+e or shape o% a lattice is not important iscalled __________.
(7lea"age, nisotrop', Homogeneit', one o% these!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 21/43
2. )n a cr'stal the densit' o% atoms or molecules does not "ar' %rom direction todirection. This is 9nown as __________.
(7lea"age, nisotrop', Homogeneit', one o% these!
3. )% one atom or molecule lies out each o% the eight corners o% a cu*e, it is called __________.
(simple cu*e, %ace centred cu*e, *od' centred cu*e, none o% these!
4. __________ is a cu*ic pattern ha"ing one e>tra atom or molecule at the centreo% each o% the si> %aces o% the cu*e.
(simple cu*e, %ace centred cu*e, *od' centred cu*e, none o% these!
. __________ is a pattern which has got one more atom at the centre o% a simplecu*e.
(simple cu*e, %ace centred cu*e, *od' centred cu*e, none o% these!
. The electrons, which can wander in the solid, are 9nown as __________.
(=alence electron, %ree electron, loosel' *ound electrons, none o% these!
. __________ o% the %ollowing theories could not e>plain completel' the *eha"iouro% conductors, insulators, and semiconductors.
(energ' *and theor', %ree electron theor', "alence electron theor', none o% these!
6. The electrons in a solid cr'stal are supposed to ha"e di%%erent energ' le"elswhich can *e %ound *' the solution o% __________.
(/a>wells equation, chrodingers wa"e equation, ?as equation, none o% these!
8. The solution o% chrodingers wa"e equation shows that the electrons can e>ist insome ranges o% energ' called __________.
(Dermissi*le energ' le"els, energ' *ands, conduction *and, %or*idden energ' le"els!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 22/43
0. The permissi*le energ' le"els ta9en in gourps are called __________.
(Dermissi*le energ' le"es, energ' *ands, conduction *ands, %or*idden energ' le"els!
1. The materials in which "alence *and and conduction *and o"erlaps are called __________.
()nsulators, 7onductors, emiconductors, uperconductors!
2. The material in which the highest occupied energ' le"el is completel' %illed iscalled __________.
()nsulator, conductor, semiconductor, superconductor!
3. The material in which the gap *etween the %illed energ' *and and ne>t higherpermitted energ' *and is small, is called __________.
()nsulator, 7onductor, semiconductor, superconductor!
4. The su*stances with resisti"it' o% order o% 10-4 ohm-metre are called __________.
()nsulators, semiconductors, conductors, good conductors!
. The su*stances with resisti"it' o% the order o% 10-6 ohm-metre are called __________.
()nsulators, semiconductors, conductors, good conductors!
. t temperature near a*solute +ero, a pure semiconductor *eha"es li9e
__________.
(an insulator, a conductor, a superconductor, none o% these!
. Iunction *etween p-t'pe material and n-t'pe material is called as __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 23/43
(diode, recti%ier, transistor, ampli%ier!
6. The semi-conductor diode has the propert' o% __________.
(one wa' conduction, two wa' conduction, +ero conduction, none o% these!
8. diode can *e used as __________.
(oscillator, recti%ier, transistor, ampli%ier!
0. )% p-t'pe material o% the pn-Iunction is connected with positi"e terminal o% the*atter' and n-t'pe material with negati"e terminal o% the *atter', it is said to *e __________.
(%orward *iased, re"ersed *iased, +ero *iased, none o% these!
1. )% p-t'pe material o% the pn-Iunction is connected with negati"e terminal o% the*atter' and n-t'pe material with positi"e terminal o% the *atter', it is said to *e __________.
(%orward *iased, re"ersed *iased, +ero *iased, none o% these!
2. de"ice, which con"erts an alternating current to a direct current, is called __________.
(Kscillator, recti%ier, ampli%ier, p-t'pe material!
3. thin la'er o% one t'pe o% semiconductor material sandwiched *etween tworelati"el' thic9 pieces o% other t'pe is termed as __________.
(iode, recti%ier, transistor, oscillator!
4. transistor consists o% __________.
(one pn-Iunction, two pn-Iunctions, three pn-Iunctions, one o% these!
. or normal transistor operation, $-< Iunction is alwa's __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 24/43
(re"ersed *iased, %orward *iased, +ero *iased, ll o% these!
. transistor can *e used as __________.
(diode, recti%ier, ampli%ier, all o% these!
. The transistor is also used as __________.
(diode, switching de"ice, recti%ier, p-t'pe material!
6. )% we use two diodes and a centre tapped trans%ormer, we will get __________.
(hal% wa"e recti%ication, %ull wa"e recti%ication, 7 current, all o% these!
8. %orward *iased p-n semiconductor diode is called __________.
(@.$., Dhotodiode, Dhoto"oltaic cell, transistor!
60. __________ is generall' a re"ersed *iased p-n Iunction in which light is allowedto %all on the p-la'er through a window pro"ided %or this purpose.
(@.$., photodiode, photo"oltaic cell, transistor!
61. Transistors has replaced __________.
(diodes, "acuum tu*es, recti%iers, photo"oltaic cell!
7hapter 1
tomic pectra
1. The radiation emitted %rom h'drogen %illed discharge tu*e, when "iewed *'dispersing de"ices such as prism, gratings etc, shows __________.
( line spectrum, 7ontinuous spectrum, @inear spectrum, all o% these!
2. :hen an electron Iumps %rom higher to lower or*it, then __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 25/43
($nerg' is a*sor*ed, $nerg' is emitted, neither a*sor*ed nor emitted, none o% these!
3. :hen electron in h'drogen atom Iumps %rom higher or*it into %irst or*it. The seto% lines emitted is called __________.
(<almer eries, @'man eries, <rac9et eries, Daschen eries!
4. :hen an electron in h'drogen atom Iumps %rom higher or*it into second or*it. Theset o% lines emitted is called __________.
(<almer eries, @'man eries, <rac9et eries, Daschen eries!
. :hen an electron in h'drogen atom Iumps %rom higher or*it into third or*it. The
set o% lines emitted is called __________.
(<almer eries, @'man eries, <rac9et eries, Daschen eries!
. :hen an electron in h'drogen atom Iumps %rom higher or*it into %ourth or*it. Theset o% lines emitted is called __________.
(<almer eries, @'man eries, <rac9et eries, Daschen eries!
. :hen an electron in h'drogen atom Iumps %rom higher or*it into %i%th or*it. Theset o% lines emitted is called __________.
(<almer eries, @'man eries, D%und eries, Daschen eries!
6. __________ o% the %ollowing series in the spectrum o% the h'drogen lies in the"isi*le region o% the electromagnetic spectrum.
(Daschen eries, <almer eries, @'man eries, <rac9ett s$ries!
8. __________ o% the %ollowing is not a %undamental postulate o% <ohrs theor' o%h'drogen atom.
(The classical theor' does not appl' in the case o% tin' particles such as electrons,The electron in a sta*le or*itdoes not radiate energ', The electron can mo"e in allpossi*le or*its, n atom radiates energ' onl' when an electron Iumps %rom an allowed
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 26/43
or*it o% higher energ' $n to one o% the lower energ $p!
10. __________ o% the %ollowing is not a %undamental postulate o% <ohrs theor' o%h'drogen atom.
(The total energ' o% the electron in one o% it allowed or*it remains constant as longas it remains in the same or*it, n electron can not re"ol"e in an ar*itrar' or*it.Knl' those or*its are possi*le %or which the angular momentum o% the electron a*outthe nucleus is an integral multiple o% h&2p, The electron can mo"e in all possi*leor*its, n atom radiates energ' onl' when an electron Iumps %rom an allowed or*it o%higher energ' $n to one o% the lower energ' $p!
11. ccording to <ohrs theor' o% h'drogen atom, an electron can re"ol"e around a
proton inde%initel' i% its path is __________.
(a per%ect circle o% an' radius, a circle o% constantl' decreasing radius, a circle o% anallowed radius, an ellipse!
12. )n a h'drogen atom the radius o% the electron or*it is go"erned *' <ohrsquantum rule which states that __________.
(the linear momentum o% the electron is quantised, the angular momentum o% the
electron is quantised, the linear "elocit' o% the electron is quantised, the angular"elocit' o% the electron is quantised!
13. ccording to <ohrs theor' o% the h'drogen atom, the total energ' o% theh'drogen atom with its electron re"ol"ing in the nth stationar' or*it is __________.
(proportional to n, proportional to n2, in"ersel' proportional to n, in"ersel'proportional to n2!
14. The energ' o% the electron o% h'drogen or*iting in a stationar' or*it o% radius rnis proportional to __________.
(rn, 1&rn, rn2, 1&rn2!
1. :hen an electron Iumps %rom the nth (higher or*it! or*it to the pth or*it (lower
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 27/43
or*it!, the di%%erence o% energ' is gi"en *' the equation __________.
(hR B $n F $p, hR B $n E $p, hR B $, hR B @p!
1. The %requenc' R o% electromagnetic radiation is gi"en *' the equation __________.
(R B lc, R B 1&l, R B c&l, one o% these!
1. The transitions o% inner- shell electrons in hea"' atoms gi"e rise to __________.
16. C-ra's are a part o% electromagnetic spectrum and are characteri+ed *'%requencies higher than those o% __________.
("isi*le radiation, in%rared radiation, ultra "iolet radiations, none o% these!
18. Droduction o% continuous C-ra's is due to the __________.
(cceleration o% incident electrons *' the nucleus o% the target atom, electrontransitions *etween inner-shells o% the target atom, electron transitions *etweenouter shells o% the target atom, annihilation o% the mass o% incident electrons!
20. C-ra's are __________.
(Dositi"el' charged particles, egati"el' charged particles, eutral particles, one o%these!
21. The stud' o% the spectrum o% characteristic C-ra's helps us to __________.
(/easure the energ' o% the incident electrons, measure the wa"elength o% theincident electrons, measure the energ' o% the emitted >-ra's, identi%' the element
o% which the target is made!
22. The ma>imum %requenc' limit o% the continuous >-ra's spectrum depends upon __________.
(the atomic num*er o% the atoms o% the target, the 9inetic energ' o% the incidentelectrons, the ma>imum %requenc' limit o% the characteristic >-ra's spectrum, the
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 28/43
degree o% "acuum in the >-ra' tu*e!
23. The de"ice that produces an intense, monochromatic and coherent *eam o% light*ased on stimulated emission o% photons %rom atoms, is called __________.
(@aser, >-ra' tu*e, discharge tu*e, c'clotron!
24. n interesting application o% laser is the production o% three-dimensional imagescalled __________.
(Dol'gons, Holograms, K"als, one o% these!
2. )n solid lasers, a %luorescent cr'stal, such as that o% __________ is used as
light ampli%'ing su*stance.
(5u*', ?lass, semiconductor, all o% these!
2. The liquid lasers usuall' ma9e use o% a d'e dissol"ed in __________ as a lightampli%'ing su*stance.
(<en+ene, 7itric acid, methanol, alcohol!
2. The laser de"ice used to %ragment gallstones and 9idne' stones is called __________.
(@aser *eam, @aser scanner, laser lithotropter, ru*' laser!
26. :hen %ast mo"ing electrons stri9e a metal target inside a partiall' e"acuatedtu*e, then __________ are produced.
(cathode ra's are produced, cosmic ra's are produced, >-ra's are produced, alpha
ra's are produced!
28. Droduct o% >-ra's is a re"erse phenomenon o% __________.
(Dhotoelectric e%%ect, 7ompton e%%ect, Dair production, nnihilation o% matter!
30. __________ is a wrong statement in the %ollowing.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 29/43
(>-ra's are not re%racted as the' pass %rom one medium to another, li9e "isi*le light,>-ra's are di%%racted at an o*stacle, >-ra's can cause ioni+ation o% the atoms o% aliquid, >-ra's are de%lected *' electric and magnetic %ields!
31. >-ra's were disco"ered *' __________.
(/adam 7urie, 5ontgen, 7oolidge, @aue!
32. C-ra's are produced when an element o% high atomic weight is *om*arded *' highenerg' __________.
(Drotons, $lectrons, eutrons, Dhotons!
33. __________ o% the %ollowing parameters o% the emitted >-ra's increases whenthe potential di%%erence *etween the electrodes o% an >-ra' tu*e is increased.
()ntensit', requenc', :a"elength, peed!
7hapter 1
The uclear Dh'sics
1. tom consists o% __________.
($lectrons, Drotons, eutrons, ll o% these!
2. tom as a whole __________.
(Dositi"el' charged particle, negati"el' charged particle, neutral particle, none o%these!
3. __________ disco"ered electron.
(5.. /ili9an, J.J. Thomson, 7roo9s, $instein!
4. <ased on the concepts o% modern ph'sics, atoms o% the 9nown elements possessesa structure consisting o% a central core o% the tom called __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 30/43
(proton, nucleons, nucleus, radius!
. 5uther%ords e>periment on the scattering o% alpha particles *' thin %oils
esta*lishes the e>istence o% __________.
(a negati"el' charged nucleus, a positi"el' charged nucleus, neutrons in the nucleus,e"en distri*ution o% charge in the atom!
. ucleus contains __________.
(electrons and protons, protons and neutrons, electrons and neutrons!
. eutron was disco"ered *' __________.
(7roo9s, J.J Thomson, 7hadwic9, none o% these!
6. The total num*er o% nucleons in the nucleus is called __________.
(tomic num*er, /ass num*er, /ole, ?ram mole!
8. The total num*er o% electron around the nucleus or total num*er o% protons in thenucleus is called __________.
(tomic num*er, /ass num*er, "ogadros num*er, ?ram mole!
10. uclei o% di%%erent elements are identi%ied *' their __________.
(tomic num*er, /ass num*er, "ogadros num*er, ?ram mole!
11. .: ston de"eloped on instrument, which uses electric and magnetic %ields tosort out atoms according to their masses. This instrument is called __________.
(7'clotron, <etatron, /ass pectrometer, <arometer!
12. uclei o% the same element ha"ing the same N *ut di%%erent "alues o% arecalled __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 31/43
()sotopes, )so*ars, )somers, llotropes!
13. uclei o% di%%erent elements with the same num*er are called __________.
()sotopes, )so*ars, )somers, llotropes!
14. H'drogen has __________.
(Kne isotope, two isotopes, three isotopes, %our isotopes!
1. The nucleus o% h'drogen with s'm*ol 1H1 is called __________.
(Droton, eutron, Triton, all o% these!
1. The nucleus o% h'drogen with s'm*ol 1H2 is called __________.
(Droton, eutron, Triton, all o% these!
1. The nucleus o% h'drogen with s'm*ol 1H3 is called __________.
(Droton, eutron, Triton, all o% these!
16. The process o% separation o% 82Q23 %rom natural uranium is called __________.
($nrichment, eparation, nnhilation, usion!
18. uclear %orces are __________.
(short range %orces, long range %orces, independent o% distances, none o% these!
20. The amount o% energ' required to *rea9 the nucleus into its constituent particlesis called __________.
(/ass de%ecit, *inding energ', ioni+ation energ', ioni+ation potential!
21. The emission o% ra's %rom the nucleus is called __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 32/43
(nnhilation o% matter, isintegration o% atoms, 5adioacti"it', ission!
22. tomic num*er with atomic num*er NS62 are __________.
(sta*le, unsta*le, small, none o% these!
23. __________ is not a radioacti"e element.
(Dolonium, 5adium, Qranium, H'drogen!
24. 5adioacti"e elements emit __________.
(a-ra's, *-ra's, g-ra's, all o% these!
2. The mass o% each a-particle is nearl' __________.
(twice times the mass o% h'drogen atom, three times the mass o% h'drogen atom,%our times the mass o% h'drogen atom, %i"e times the mass o% h'drogen atom!
2. a-particle is __________.
(Dositi"el' charge, negati"el' charge, neutral, one o% these!
2. 7harge on each a-particle is equal to __________.
(the 7harge on proton, twice the charge on proton, three times the charge on proton,%our times the charge on proton!
26. __________ o% the %ollowing particles has "er' high ioni+ation capa*ilit'.
(a-particle, *-particle, g-particle, all o% these!
28. __________ o% the %ollowing particles has "er' low penetration power.
(a-particle, *-particle, g-particle, all o% these!
30. __________ o% the %ollowing particle can induce arti%icial rdioacti"it' in certainnuclei.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 33/43
(a-particle, *-particle, g-particle, all o% these!
31. C-ra's are %ound to *e in __________.
(electromagnetic wa"es, electrons, %astl' mo"ing helium nucleus, %astl' mo"ingneutron!
32. __________ o% the %ollowing particles consists o% %ast mo"ing electrons.
(a-particle, *-particle, g-particle, all o% these!
33. __________ o% the %ollowing particles has less 9inetic energ'.
(a-particle, *-particle, g-particle, all o% these!
34. __________ o% the %ollowing particles mo"e with "elocit' o% light.
(a-particle, *-particle, g-particle, all o% these!
3. C-5a's are __________.
(Dositi"el' charged, negati"el' charged, neutral, none o% these!
3. __________ ra's or particles are not de%lected *' electric and magnetic %ield.
(a-particle, *-particle, g-particle, all o% these!
3. :hen g-ra's are *om*arded on metals, the' emit __________.
(Drotons %rom the metal sur%ace, neutrons %rom the metal sur%ace, electrons %romthe metal sur%ace, all o% these!
36. The penetrating power o% g-ra's is a*out hundred times larger than that o% __________.
(Dhotons, a-ra's, *-ra's, electrons!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 34/43
38. g-ra's are electromagnetic radiations similar to __________.
(radiowa"es, photons, >-ra's, *-ra's!
40. Qnsta*le isotopes are called __________.
()so*ars, isomers, radioacti"e isotopes, none o% these!
41. )sotopes di%%er onl' in the num*er o% __________.
(electrons, protons, neutrons, none o% these!
42. :hen a nucleus wmits an alpha radiation&particles its atomic num*er drops *'
__________.
(1, 2, 3, 4!
43. :hen a nucleus emits an alpha radiation&particles its nucleon num*er drops *' __________.
(1, 2, 3, 4!
44. :hen an element emits *-particles, its mass num*ers __________.
(increases *' 1, decreases *' 1, remains same, *ecomes +ero!
4. :hen an element C emits gamma-ra's, its atomic num*er N __________.
()ncreases *' 1, decreases *' 1, remains same, none o% these!
4. :hen an element C emits gamma ra's, its mass num*er __________.
(increases *' 1, decreases *' 1, remains sme, none o% these!
4. Kut o% the %ollowing __________ is not emitted *' a radioacti"e su*stance.
(electrons, electromagnetic radiations, helium nuclei with a charge equal to that o%two protons, neutrons!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 35/43
46. The time required %or the element to deca' to one hal% o% its original num*er iscalled __________.
(Transmutation, hal%-li%e, nuclear deca', none o% these!
48. )t has *een o*ser"ed that, on the a"erage, the actual num*er o% atoms whichdeca' at an' instant is __________.
(in"ersel' proportional to the num*er o% atoms present, directl' proportional to thenum*er o% atoms present, in"ersel' proportional to the square o% the total num*er o%atoms present, in"ersl' proportional to the square root o% the total num*er o% atomspresent!
0. The hal% li%e o% a radioacti"e su*stance is 10da's. This means that __________.
(the su*stance completel' disintegates in 20 da's, the su*stance completel'disintegrates in 40da's, 1&6 part o% the mass o% the su*stance will *e le%t intact atthe end o% 40 da's, &6 part o% the mass o% the su*stance disintegrates in 30 da's!
1. The hal%-li%e o% a radioacti"e su*stance depends upon __________.
(its temperature, the e>ternal pressure on it, the mass o% the su*stance, thestrength o% the nuclear %orce *etween the nucleons o% its atoms!
2. __________ o% the %ollowing conser"ation laws must *e o*e'ed in a nuclearreaction.
(the conser"ation o% electric charge, the conser"ation o% energ' and mass, theconser"ation o% linear momentum, the conser"ation angular momentum, all o% these!
3. __________ o% the %ollowing particles is considered as an ideal proIectile %orinduced nuclear reactions.
($lectrons, Droton, neutron, g-particle!
4. :hen mass m is con"erted into energ' it release energ' equal to __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 36/43
(mc2, mc3, m2c, mc!
. The splitting o% nuclei o% a su*stance into two or more %ragments, with emission
o% energ', its called __________.
(uclear %ission, uclear %usion, a-deca', one o% these!
. The process in which two smaller nuclei com*ine to corm a *ig nucleus withrelease o% energ' is called __________.
(uclear %ission, uclear %usion, a-deca', none o% the a*o"e!
. )n a %ission reaction each nucleus emits a*out __________.
(one to two neutrons, two to three neutrons, one to two electrons, two to threeelectrons!
6. __________ gi"e more energ'.
(uclear ission, uclear usion, <urning o% 7oal, one o% these!
8. The sun which is largest source o% heat energ' gets its energ' *' the process o% __________.
(uclear ission, uclear ission, uclear 7hain reaction, all o% these!
0. tomic *om* is *ased on the principle o% __________.
(uclear ission, uclear usion, uclear 7hain 5eaction, one o% these!
1. H'drogen *om* is *ased on the principle o% __________.
(uclear ission, uclear usion, uclear 7hain 5eaction, one o% these!
2. de"ice which is used to e>tract nuclear energ' with easier means and with outan' harm to en"ironment and human *eings and utili+e the energ' %or %ruit%ulpurposes in e"er'da' li%e and wor9 is __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 37/43
(7'clotron, uclear 5eactor, H'drogen *om*, <etatron!
3. ?raphite and hea"' water are two common moderators used in a nuclear reactor.
The %unction o% the moderator is __________.
(to slow down the neutrons to thermal energies, to a*sor* the neutrons nad stop thechain reaction, to cool the reactor, to control the energ' released in the reactor!
4. 7admium rods are used in nuclear reactor %or __________.
(slowing down %ast neutrons, speeding up slow neutrons, a*sor*ing neutrons, regulatingthe power le"el o% the reactor!
. )n @iquid /etal ast <reeder 5eactor we use __________.
(water as coolant, odium metal as coolant, graphite as coolant, none o% these!
. __________ nuclear radiation detector is *ased on the principles Othatsupersaturated "apours condense more readil' on ions or dust particlesP.
(:ilson 7loud cham*er, ?eiger counter, olid state detector, none o% these!
. the olid-tate etector is *asicall' __________.
(a %orward *iased pn-Iunction, a re"ersed *iased pn-Iunction, a %orward *iasedtransistor, a photocell!
7hapter 1
d"ent o% /odern Dh'sics
1. /odern ph'sics consists o% __________.
(ewtonian /echanics, $insteins special theor' o% relati"it', chrodingers wa"emechanics, $insteins special theor' o% relati"it' and Guantum mechanics!
2. The most %undamental to classical ph'sics is&are __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 38/43
(/a>wells equations, chrodingers wa"e equation, @aw o% newtonian mechanics,pecial theor' o% relati"it'!
3. __________ *elie"ed in a*solute time.
($instein, /a>well, ?alileo, ?alileo and ewton!
4. set o% coordinate a>es with respect to which measurements are made is called __________.
(%rame o% re%erence, inertial %rame o% re%erence, non-inertial %rame o% re%erence,none o% these!
. $"er' motion is __________.
(relati"e, a*solute, +ero, none o% these!
. %rame o% re%erence in which ewtons laws o% motion are "alid is called __________.
(7artesian %rame o% re%erence, inertial %rame o% re%erence, non-inertial %rames o%
re%erence, a*solute %rame o% re%erence!
. %rame o% re%erence in which ewtons laws o% motion are not "alid is called __________.
(7artesian %rame o% re%erence, inertial %rame o% re%erence, non-inertial %rames o%re%erence, a*solute %rame o% re%erence!
6. __________ o% the ewtonian laws don not hold in an accelerated %rame o%
re%erence.
(ewtons %irst and second law o% motion, ewtons scond and third law o% motion,third law o% motion, ewtons %irst law o% motion and law o% ?ra"itation!
8. __________ o% the %ollowing statements is not correct.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 39/43
(the law o% ph'sics are the same in all inertial %rames, the speed o% light in %reespace has the same "alue in all inertial %rames, two e"ents which occur simultaneousl'in one re%erence %rame also must appear to occur simultaneous in another re%erence%rame, $instein reIected ewtons idea o% a*solute time!
10. The simple assumption that all possi*le re%erence %rames mo"ing with uni%orm"elocit' relati"e to one another are equi"alent %or the statement o% laws o% ph'sics iscalled the __________.
(Drinciple o% 5elati"it', Qncertainit' Drinciple, Daulis $>clusion Drinciple, one o%these!
11. pecial theor' o% relati"it' states that __________.
(ll laws o% ph'sics are the same in e"er' inertial re%erence %rame, $"er' motion isrelati"e, @ight has dual nature, $nerg' and mas are intercon"erta*le!
12. pecial theor' o% relati"it' states that __________.
(Time is a*solute, The speed o% light in a "acuumm, measured in all inertial re%erence%rames alwa's has the same "alue o% c, no matter how %ast the source o% light andthe o*ser"er are mo"ing relati"e to each other, space is a*solute, at rest mas o% an
o*Iect is alwa's +ero!
13. *od' o% some material capa*le o% a*sor*ing all heat radiation incident on it andcan emit in turn all the radiation at constant temperature a%ter it is in equili*riumwith it is called __________.
(<lac9 *od', <lac9 *od' radiation, <lac9 *od' ca"it', 7a"it' radiation!
14. 5a'leigh Jeans theor' is incomplete disagreement with the e>perimental cur"e o%
*lac9 *od' radiation __________.
()n the region o% short wa"elength, in the region o% long wa"elength, *oth in theregion o% short and long wa"elength, none o% these!
1. :eins theor' is complete disagreement with the e>perimental cur"e o% *lac9
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 40/43
*od' radiation __________.
()n the region o% short wa"elength, in the region o% long wa"elength, *oth in theregion o% short and long wa"elength, none o% these!
1. )n 1800, __________ proposed a %ormula which e>plained ) detail the wholeshape o% the *lac9 *od' spectrum %or all wa"elengths.
(:ein, 5a'leigh, $instein, /a>well Dlan9!
1. __________ proposed quantum theor' o% radiation.
(:ein, $instein, Dlan9, ewton!
16. __________ theor' e>plains that energ' e>change ta9es place in discreteO*undlesP or OquantaP.
(pecial theor' o% 5elati"it', Guantum Theor', 7orpuscular Theor', <ohrs Theor'!
18. /athematicall' Guantum theor' is states as __________.
($ B mc2, $ B h%, " B nl, none o% these!
20. @ight consists o% particle wa"e called __________.
(Droton, $lectron, eutron, Dhoton!
21. The rest mass o% photon is __________.
(Kne, Nero, )n%inite, one o% these!
22. )n 180, __________ proposed that the pac9ets or *undles o% energ' areintegral part o% all electromagnetic radiations.
(Dlan9, $instein, ewton, :ein!
23. The process o% eIection o% loosel' *ound electrons %rom a metallic sur%ace *' thea*sorption o% photons is called __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 41/43
(Dair production, 7ompton $%%ect, Dhotoelectric e%%ect, Qncertainit' Drinciple!
24. The photoelectric e%%ect esta*lishes that __________.
(@ight tra"els in the %orm o% inertial o% quanta o% energ', @ight tra"els in the %orm o%trans"erse wa"es, light tra"els in the %orm o% longitudinal wa"es, light is a trans"erseelectromagnetic wa"e!
2. The photoelectric emission %rom the sur%ace o% a metal starts onl' when the lightincident on the sur%ace has a certain __________.
(minimum %requenc', minimum wa"elength, minimum intensit', minimum speed!
2. t %requencies o% the incident radiation a*o"e the threshold %requenc', thephotoelectric current in a photoelectric cell increases with the increase in __________.
(intensit' o% incident radiation, wa"elength o% incident radiation, %requenc' o% incidentradiation, speed o% incident emitted %rom a metal sur%ace!
2. The photoelectrons emitted %rom a metal sur%ace __________.
(are all at rest, ha"e the same 9inetic energ', ha"e the same momentum, ha"e speeds"ar'ing %rom +ero up to a certain ma>imum "alue!
26. or each material emission occurs onl' %or certain de%inite %requenc' %o o% lightcalled __________.
(1 Hert+, 7ritical %requenc', threshold %requenc', minimum %requenc'!
28. mount o% energ' in a photon depends on the __________.
(rest mass, %requenc', momentum, wa"elength!
30. The minimum energ' o% an electron that must ha"e in order to escape %rom themetal sur%ace is called __________.
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 42/43
(topping potential, wor9 %unction, threshold %requenc', wa"elength!
31. Dhotoelectric e%%ect is a phenomenon in which electromagnetic wa"es e>hi*it __________.
(wa"e nature, particle nature, *oth wa"e and particle nature, none o% these!
32. )n 7ompton e%%ect __________.
(The scattered photon has %requenc' less than that o% the incident photon, thescattered photon has %requenc' greater than that o% the incident photon, thescattered photon has %requenc' equal to the incident photon, none o% these!
33. Kn mo"ing %rom one place to another electromagnetic radiation *eha"es as __________.
(particles, wa"es, *oth particles and wa"es, none o% these!
34. $lectromagnetic radiation when interact with material particle, *eha"es as __________.
(particles, wa"es, *oth particles and wa"es, none o% these!
3. :hen we tr' to stop a "er' high photon it loses its identi%' and disintegrationinto an electron and a positron. This is called __________.
(Dair production, nnihilation, C-ra's production, 7ompton e%%ect!
3. process re"erse to the pair production is 9nown as __________.
(Dhotoelectric e%%ect, nnihilation, C-ra's production, 7ompton $%%ect!
3. :hen an electron and a positron com*ine together in such a wa' that *oth o%them disappear and their com*ined mass reappear as two gamma ra' photons. This iscalled __________.
(Dhotoelectric e%%ect, nnihilation, C-ra's production, 7ompton e%%ect!
8/12/2019 MCQs Physics Part II
http://slidepdf.com/reader/full/mcqs-physics-part-ii 43/43
36. OThe product o% the uncertainties in momentum (p! and position!>! o% particleat some instant is appro>imatel' %o the order o% Dlan9s constant hP. This is called __________.
(Daulis $>clusion Drinciple, Heisen*erg Qncertainit' Drinciple, Dhotoelectric e%%ect,7ompton e%%ect!