ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

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

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Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Question # 1

A certain charge liberates 0.8 g of oxygen. The same charge will liberate. how many g of silver?

Question # 2

The ohm's is defined as

Question # 3

Resistor is a device which convert electric energy to

Question # 4

The charge carriers in electrolyte are positive and negative

Question # 5

The electric field intensity at a point due to a point charge

Question # 6

The relation between the charge Q of a parallel plate capacitor and the P.D between its plates is

Question # 7

One electron volt is equal to

Question # 8

Which of the following does not obey ohm's law?

Question # 9

Current provided by a battery is maximum when

Question # 10

When an electron is accelerated through a P.D. of an one volt, it will acquire energy equal to

Question # 11

The thermistors are usually made of

Question # 12

106electrons are moving through a wire per second, the current developed is

Question # 13

A condenser of capacity 50μF is charged to 10 V.The energy stored is

Question # 14

Resistance of a conductor is increased, the currant will

Question # 15

The charge carriers in gases are

Question # 16

At ordinary temperature, an increase in temperature increases the conductivity of

Question # 17

When three identical bulbs of 60 watt, 200 volt rating are connected in series to a 200 volt supply, the power drawn by them will be

Question # 18

Surface density of charge is defined as

Question # 19

An electric dipole is at the centre of a hollow sphere of radius r. The total normal electric flux through the sphere is (here Q is the charge and d is the distance between the two charges of the dipole)

Question # 20

The capacitance of a parallel plate capacitor depends upon

Question # 21

The capacity of a parallel plat capacitor depends on the

Question # 22

Equal charges are given to two spheres of different radii. The potential will

Question # 23

Some charge is being given to a conductor. Then its potential

Question # 24

An electric charge at rest is

Question # 25

Free electrons are

Question # 26

The unit of resistivity is

Question # 27

One joule is equal to

Question # 28

A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J

Question # 29

An electron of charge e coulomb passes through a potential difference of V volts its energy in joules will be

Question # 30

If we plot graph between potential difference (V) and current (I) obeying ohm's law, it will give us

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The excess (equal in number) of electrons that must be placed on each of two small spheres spaced 3 cm apart, with force of repulsion between the spheres to be 10-19N, is
A. 25
B. 225
C. 625
D. 1250
2 A capacitor of capacity 1μF is charged to 1 KV. The energy stored in J
A. 5
B. 0.5
C. 0.005
D. 50
3 Thermocouple is an arrangement of two different metals
A. To convert heat energy in to electrical energy
B. To produce more heat
C. To convert heat energy into chemical energy
D. To convert electric energy in to heat energy
4 The relation between charge 'Q' and current 'I' is given by
A. Q = I/t
B. Q = It
C. Q = I2t
D. Q = I2/t
5 The force between two chares 0.06 m apart is 5 N. If each charge is moved towards the other by 0.01 m, then the force between them will become
A. 7.20 N
B. 11.25 N
C. 22.50 N
D. 45.00
6 Which one of the following causes production of heat when current is set up in a wire?
A. Fall of electrons from higher orbits to lower orbits
B. Inter-atomic collisions
C. Inter-electron collisions
D. Collisions of conduction electron with atoms
7 Force acting upon a charged particle kept between the plates of a charged condenser if F. IF one of the plates of the condenser is removed, force acting on the same will become
A. Zero
B. F/2
C. F
D. 2F
8 Coulomb force, when any material medium is placed between two charges
A. Increases
B. Decreases
C. Remain unchanged
D. None of these
9 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
10 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

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