ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

Try The MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

The earth's potential is taken as

Question # 2

The speed of randomly moving electrons depends upon

Question # 3

One joule is equal to

Question # 4

The resistivity of a substance depends upon the

Question # 5

If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?

Question # 6

A hollow insulated conduction sphere is given a positive charge of 10μC. What will be the electric field at the centre of the sphere if its radius is 2 meters?

Question # 7

Which of the following represents an electric current?

Question # 8

The minimum resistance that can be obtained by connecting 5 resistance of 1/4Ωeach is

Question # 9

The fractional change in resistance per kelvin is known as

Question # 10

In a charged capacitor the energy is stored in

Question # 11

The liquid which conduct current is known as

Question # 12

The current through a metallic conductor is due to the motion of

Question # 13

Specific resistance of a wire depends upon

Question # 14

Surface density of charge is defined as

Question # 15

The unit of resistivity is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 106electrons are moving through a wire per second, the current developed is
A. 1.6 x 10-19
B. 1 A
C. 1.6 x 10-15 A
D. 106A
2 If a charged spherical conductor of radius 10 cm has potential V at a point distance 5 cm from its centre, then the potential at a point distance 15 cm from the centre will be
A. 1/3 V
B. 2/3 V
C. 3/2 V
D. 3V
3 Two point charge +3μC and +8μC repel each other with a force of 40 N. If a charge of -5μC is added to each of them, then the force between then will become
A. -10 N
B. +10 N
C. +20 N
D. -20 N
4 The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is
A. Q=V/C
B. Q=C/V
C. Q=1/2CV
D. Q=CV
5 A charge Q is divided into two parts q and Q - q and separated by a distance R. The force of repulsion between them will be maximum when
A. q = Q/4
B. q = Q/2
C. q = !
D. None of these
6 The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be
A. 1 : 2
B. 2 : 1
C. 1 : 4
D. 4 : 1
7 If two bulbs one of 60 W and other of 100 W are connected in parallel, then which one of the following will flow more?
A. 60 W bulb
B. 100 W bulb
C. Both equally
D. None of these
8 Three resistors of resistance 2,3 and 6 ohms are connected in parallel, their equivalent resistance is
A. 11.0 ohm
B. 1.0 ohm
C. 7.0 ohm
D. 3.0 ohm
9 A heater coil rated at (1000 W - 200 V) is connected to 110 volt line. What will be the power consumed?
A. 200 W
B. 302.5
C. 250 W
D. 350 W
10 The current through a metallic conductor is due to the motion of
A. protons
B. neutrons
C. electrons
D. free electrons

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