In the circuit shown, if a conducting wire is connected 4 ......A cell of e.m.f. E is connected with and external resistance R, then p.d. across cell is V. The internal resistance

In the circuit shown, if a conducting wire is connected

between points A and B, the current in this wire will

(A) Be zero

(B) Flow from B to A

(C) Flow from A to B

(D) Flow in the direction which will

be decided by the value of V

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MENTI QUIZ - 51

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0201

V

A

B

4 4

31

In a typical Wheatstone network, the resistances in cyclic

order are A = 10 , B = 5 , C = 4 . For the bridge to be

balanced

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0202

(A) 10 should be connected in parallel with

A

(B) 10 should be connected in series with A

(C) 5 should be connected in series with B

(D) 5 should be connected in parallel with

B

D = 4 C = 4

B = 5 A = 10

In the above circuit the current in each resistance is

(A) 0 A (B) 1 A

(C) 0.25 A (D) 0.5 Awww.gangwarinstitue.comwww.gangwarinstitute.com Contact info : 8400-582-582, 8604-582-582

0203

2V

2V

2V

2V

2V

2V

A set of ‘n’ equal resistor, of value ‘R’ each, are

connected in series to a battery to emf ‘E’ and

internal resistance ‘R’. The current drawn is 1. Now,

the ‘n’ resistors are connected in parallel to the same

battery. Then the current drawn from battery

becomes 10.1. The value of ‘n’ is

(A) 10 (B) 11

(C) 20 (D) 9


0204

A battery of emf 8 V with internal resistance 0.5

is being charged by a 120 V d.c. supply using a

series resistance of 15.5. The terminal voltage of

the battery is

(A) 20.5 V (B) 15.5 V

(C) 11.5 V (D) 2.5 V


0205

A battery of emf E produces currents I1 and I2 when

connected to external resistances R1 and R2

respectively. The internal resistance of the battery is


0206

A student measures the termibal potential

difference (V) of a cell (of emf E and internal

resistance r) as a function of the current (I) flowing

through it. The slope, and intercept, of the graph

between V and I, then, respectively, equal

(A) E and –r (B) –r and E

(C) r and –E (D) –E and r


0207

A cell of e.m.f. E is connected with and external

resistance R, then p.d. across cell is V. The internal

resistance of cell will be


0208

The figure below shows currents in a part of

electric circuit. The current i is

(A) 1.7 amp

(B) 3.7 amp

(C) 1.3 amp

(D) 1 ampwww.gangwarinstitue.comwww.gangwarinstitute.com Contact info : 8400-582-582, 8604-582-582

0209

2amp

2amp

1amp

1.3amp

i

A 5 V battery with internal resistance 2 and a 2V

battery with internal resistance 1 are connected to a

10 resistor as shown in the figure

The current in the 10 resistor is

(A) 0.03 A P1 to P2

(B) 0.03 A P2 to P1

(C) 0.27 A P1 to P2

(D) 0.27 A P2 to P1


0210

2V

P2

P1

5V

210

Two cities are 150 km apart. Electric power is sent

from one city to another city through copper

wires. The fall of potential per km is 8 volt and the

average resistance per km is 0.5 . The power loss

in the wire is

(A) 19.2 J (B) 12.2 kW

(C) 19.2 kW (D) 19.2 kWwww.gangwarinstitue.comwww.gangwarinstitute.com Contact info : 8400-582-582, 8604-582-582

0211

Calculate the value of E, for given circuit, when

value of 2 amp current is either flowing in

clocckwise or anticlockwise direction

(A) 3V, 28 Volt

(B) 38 V, 2 Volt

(C) 3V, 30 Volt

(D) 3V, 2.8 Volt


0212

20V

+E38V

5 cells, each of emf 0.2V and internal resistance 1

are connected to an external circuit of resistance of

10. Find the current through external circuit


0213

Two identical cells send the same current in 2

resistance, whether connected in series or in

parallel. The internal resistance of the cell should

be

(A) 1 (B) 2

(C) 1/2 (D) 2.5


0214

The internal resistances of two cells shown are 0.1

and 0.3. If R = 0.2, the potential difference across

the cell

(A) B will be zero

(B) A will be zero

(C) A and B will be 2V

(D) A will be >2V and B will be <2Vwww.gangwarinstitue.comwww.gangwarinstitute.com Contact info : 8400-582-582, 8604-582-582

0215

A B

2V, 0.1

2V, 0.3

0.2

In the circuit shown in the figure, if the potential

at point A is taken to be zero, the potential at point

B is

(A) –2V

(B) +1V

(C) –1V

(D) +2V


0216

2V

1V

R2

R1

2A

B

2A

1A

1A

AC

D

The cells having the internal resistance 0.2 and

0.4 are connected in parallel. The voltage across

the battery terminal is 1.5 Volt. The e.m.f. of first

cell is 1.2 Volt. The e.m.f. of the second cell is

(A) 2.7 Volt (B) 2.1 Volt

(C) 3 Volt (D) 4.2 Volt


0217

A current 2 A flows through a 2 resistor when

connected when connected across a battery. The

same battery supplies a current 0.5 A when

connected across a 9 resistor. The internal

resistance of the battery is

(A) 1 (B) 0.5

(C) 1/3 (D) 1/4 www.gangwarinstitue.comwww.gangwarinstitute.com Contact info : 8400-582-582, 8604-582-582

0218

In the circuit given here, the points A, B and C are 70 V, zero,

10 V respectively. Then


0219

(A) The point D will be at a potential of 60 V

(B) The point D will be at a potential of 20 V

(C) Currents in the paths AD, DB and DC

are in the ratio of 3 : 2 : 1

(D) Currents in the paths AD, DB and DC

are in the ratio of 3 : 2 : 1

A

B

C

D

When a resistance of 2ohm is connected across the

terminals of a cell, the current is 0.5A, When the

resistance is increased to 5 ohm, the current is 0.2

A. The e.m.f. of the cell is

(A) 1.0V (B) 1.5V

(C) 1V (D) 2.5V


0220

The magnitude of i in ampere unit is

(A) 0.1

(B) 0.3

(C) 0.6

(D) None of these


0221

Two batteries, one of emf 18 and internal

resistance 2 and the other of emf 12 volt and

internal resistance 1, are connected as shown.

The voltmeter V will record a reading of

(A) 15 volt (B) 30 volt

(C) 14 volt (D) 18 volt


0222

The maximum power drawn out of the cell

from a source is given by (where r is internal

resistance)

(A) E2/2r (B) E2/4r

(C) E2/r (D) E2/3r


0223

The current in the given circuit is

(A) 0.1A

(B) 0.2A

(C) 0.3A

(D) 0.4A


0224

When a resistor of 11 is connected in series with

an electric cell, the current flowing in it is 0.5 A.

Instead, when a resistor of 5 is connected to the

same electric cell in series, the current increases by

0.4 A. The internal resistance of the cell is

(A) 1.5 (B) 2

(C) 2.5 (D) 3.5


0225

The n rows each containing m cells in series are in

parallel. Maximum current is taken from this

combination across an external resistance of 3

resistance. If the total number of cells used are 24

and internal resistance of each cell is 0.5 then

(A) m = 8, n = 3 (B) m = 6, n = 4

(C) m = 12, n = 2 (D) m = 2, n = 12


0226

Two batteries with e.m.f. 12 V and 13 V are

connected in parallel across a load resistor of 10.

The internal resistances of the two batteries are

1 and 2 respectively. The voltage across the

load lies between.

(A) 11.5V and 11.6V (B) 11.4V and 11.5V

(C) 11.7V and 11.8V (D) 11.6V and 11.7V


0227

In a Wheatstone’s bridge, three resistance P, Q and R are

connected in the three arms and the fourth arm is formed

by two resistances S1 and S2 connected in parallel. The

condition for the bridge to be to be balanced will be


0228

Three unequal resistors in parallel are equivalent

to a resistance 1 ohm. If two of them are in the

ratio 1 : 2 and if no resistance value is fractional,

the largest of the three resistances in ohm is

(A) 4 (B) 6

(C) 8 (D) 12


0229

In the circuit shown below, the reading of the

Voltmeter V is

(A) 12 V

(B) 8 V

(C) 20 V

(D) 16 Vwww.gangwarinstitue.comwww.gangwarinstitute.com Contact info : 8400-582-582, 8604-582-582

0230

4 16

16 4

2A V

Documents

In the circuit shown, if a conducting wire is connected 4 ......A cell of e.m.f. E is connected with and external resistance R, then p.d. across cell is V. The internal resistance