UnitPHYSICAL QUANTITIES AND MEASUREMENT

01

Q1.Define science. 01(001)Q2.Define physics and explain its branches. 01(002)Q3.Write the importance of physics in our daily life?01(003)Q4.Define physical quantities. Also write its types.01(004)Q5.What is international system of units? OR What role SI Units have played in the development of Science?01(005)Q6.What are base units and derived units?01(006)Q7.Define prefixes and give example? 01(007)Q8.Define Scientific Notation and give example. 01(008)Q9.What are measuring instruments? Explain meter rule and measuring tape. 01(009)Q10.What is meant by vernier callipers? Write its construction. 01(010)Q11.How we can take reading on Vernier Callipers? (Practical).01(011)

Q12.Define SCREW GAUGE and write its construction. 01(012)Q13.How does screw Gauge work? (Practical).01(013)Q14.What are mass measuring instruments?01(014)Q15.What is physical balance? Write its construction and working? 01(015)Q16.Show by an example which one is the most Accurate Balance?01(016)Q17.What is meant by Stopwatch? Writes its types. 01(017)Q18.What is measuring cylinder? Explain. 01(018)Q19.How can we measure the volume of an irregular shaped solid object?01(019)Q20.Define SIGNIFICANT FIGURES and write its rules to consider zero as significant figures? 01(020)

MULTIPLE CHOICE QUESTIONS

Encircle the correct answer from the given choices:

1.The number of base units in SI are(a) 3(b) 601(021)(c) 7(d) 92.Which one of the following unit is not a derived unit01(022)(a) pascal (b) kilogramme (c) newton(d) watt3.Amount of a substance in terms of numbers is measured in:01(023)(a) gram (b) kilogramme (c) newton (d) mole4.An interval of 200 s equivalent to:(a) 0.2s(b) 0.02s01(024)(c) 2 x 10-4s(d) 2 x 10-6 s5.Which one of the following is the smallest quantity.01(025)(a) 0.01g(b) 2mg(c) 100g(d) 5000ng6.Which instrument is most suitable to measure the internal diameter of a test tube:01(026)(a) Metre rule (b) Vernier Calliper(c) Measuring tap (d) Screw Gauge7.A student claimed the diameter of a wire as 1.032 cm using Vernier callipers. Upto what extent do you agree with it.01(027)(a) 1 cm (b) 1.0 cm (c) 1.03 cm(d) 1.032 cm 8.A measuring cylinder is used to measure. (a) mass (b) area01(028)(c) volume (d) level of liquid 9.A student noted the thickness of glass sheet using screw gauge. On the main scale it reads 3 division. While 8th division on the circular scale coincides with index line. Its thickness is.01(029)(a) 3.8 cm(b) 3.08 mm(c) 3.8 mm(d) 3.08 m10. Significant figures in an expression are.(a) all the digits 01(030)(b) all accurately known digits (c) all the accurately known digits and the first doubtful digit(d) all the accurately known digits and all the doubtful digits 11. 1 micro()=01(031)(a) 10-3(b) 10-6(c) 10-12(d) 10-212.1nm have meters.01(032)(a) 10-3m(b) 10-6 m(c) 10-9m(d) 10-10m13.In measurement 1.032 numbers of significant figure are01(033)(a) 1(b) 2(c) 3(d) 414.The unit of electric current is.01(034)(a) candela(b) metre(c) second(d) Ampere15.Andromeda is one of the billions of galaxies is known as. 01(035)(a) star(b) asteroid(c) pole(d) universe16.The study of the structure and properties of atom is called.01(036)(a) Electricity(b) nuclear physics(c) geo physics(d)atomic physics 17.The eleventh general conference was held in Paris 01(037)(a) 1959(b) 1961(c) 1660(d) 196018. The unit of electric charge is.01(038)(a) Coulomb(b) ampere(c) volt(d) joule 19. The least count of vernier calipers is: (a) .01mm(b)0.1mm01(039)(c) .001mm (d) .01m20. The least count of screw gauge is (a) .01mm(b)0.1mm01(040)(c) .001mm (d) .01m21. A thimble of circular scale consists of equal division.01(041)(a) 100(b) 10(c) 1000(d) none of these22. In screw gauge if zero of circular scale is behind the index line is called error.01(042)(a) 100(b)zero(c) negative (d) positive23.The number 275.00 consists of significant figures.01(043)(a) 3(b) 5(c) 4(d) 224.Science is that word which is derived by Latin word01(044)(a) Scient(b) Scientis(c) Scientia (d) Scincet25.The number .00580 in scientific notation is 01(045)(a) 5.80105(b) 5.8010-4(c) 5.8010-3(d) .5.8010-226.The unit of force is 01(046)(a) Newton(b) m3(c) ms-2(d) ms-1

SHORT ANSWER QUESTIONS

Q1.Pick out the base units in the following 01(047)Q2.Find the base quantities involved in each of the following derived quantities: 01(048)(a) speed(b) volume(c) force(d) workQ3.Estimate your age in seconds.01(049)Q4.What role SI units have played in the development of science?01(050)Q5.What is meant by vernier constant?01(051)Q6.What do you understand by the zero error of a measuring instrument?01(052)Q7.Why is the use of zero error necessary in a measuring instrument?01(053)Q8.What is a stopwatch? What is the least count of a mechanical stopwatch you have used in the laboratories?01(054)Q9.Why do we need to measure extremely small interval of time?01(055)Q10.How is precision related to the significant figures in a measured quantity?01(056)Q11.What do you know about Andromeda?01(057)Q12.Name five prefixes commonly used.01(058)Q13.How can we round the number?01(059)Q14.Identify the base quantity in the following: 01(060)(i)Speed (ii)Area(iii)Force(iv)DistanceQ15.Identify the following as base or derived quantity: 01(061)Density, force, mass, speed, time, length, temperature and volume. Q16.The Sun is one hundred and fifty million kilometers away from the Earth. Write this(a) as an ordinary whole number. 01(062)(b) In scientific notation.Q17.Write the number given below in scientific notation.01(063)(a) 3000000000(b)6400000 m(c)0.00000000 16g(d)0.0000548 sQ18.Which one of the two instruments is more precise and why?01(064)(a) Vernier Callipers(b) Screw gauge

NUMERICAL PROBLEMS=Q1.1.Express the following quantities using prefixes.01(065)(a)5000 g (b) 2000 000 W

(c)5210-10kg (d) 225 10-8 s Q1.2How do the prefixes micro, nano and pico relate to each other?01(066)Q1.3Your hair grow at the rate of 1mm per day. Find their growth rate in nm s-1 01(067)Q1.4Rewrite the following in standard form.01(068)

(a) 116810 -27(b) 32105

(c) 72510-5kg (d) 0.0210-8Q1.5Write the following quantities in standard form.01(069)(a) 6400 km (b) 380 000km (c) 300 000 000ms- (d) seconds in a day Q1.6On closing the jaws of a Vernier Calliper, zero of the vernier scale is on the right to its main scale such that 4th division of its vernier scale coincides with one of the main scale division. Find its zero error and zero correction. 01(070)Q1.7A screw gauge has 50 divisions on its circular scale. The pitch of the screw gauge is 0.5mm. What is its least count? 01(071)Q1.8Which of the following quantities have three significant figures?01(072)(a) 3.0066m(b) 0.00309kg

(c) 5.051027kg (d) 301.0 s

Q1.9What are the significant figures in the following measurements?01(073)(a) 1.009m(b) 0.00450kg

(c) 1.661027kg(d) 2001 sQ1.10 A chocolate wrapper is 6.7 cm long and 5.4 cm wide. Calculate its area upto reasonable number of significant figures.