ECAT Pre General Science Physics Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 12 Electrostatics

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

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ECAT Pre General Science Physics Chapter 12 Electrostatics

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Question # 1

The relation V = IR represents

Question # 2

A proton is about 1840 times heavier than an electron. When it is accelerated by a potential difference of 1 KV, its kinetic energy will be

Question # 3

If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is

Question # 4

The concept of field theory was put forward by

Question # 5

The resistance of an incandescent lamp is

Question # 6

At any point on the right bisector of the line joining two equal and opposite charges

Question # 7

An electric charge at rest is

Question # 8

If electric and gravitational force on an electron in a uniform electric field will be

Question # 9

The nature of capacity of electrostatic capacitor depends on

Question # 10

The SI unit of electric field intensity is

Question # 11

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

Question # 12

The electric field will be uniform

Question # 13

Surface density of charge is defined as

Question # 14

In a charged capacitor the energy is stored in

Question # 15

The resistance of a conductor does not depend on its

Question # 16

Electric generators which convert mechanical energy into

Question # 17

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

Question # 18

Coulomb force, when any material medium is placed between two charges

Question # 19

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

Question # 20

The charge per unit time through any cross-section of a conductor is called

Question # 21

The speed of randomly moving electrons depends upon

Question # 22

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then

Question # 23

The force of repulsion between two point charges is F, when these are at a distance 0.1 m apart. Now the point charges are replaced by sphere of radii 5 cm each having the same charge as that of the respective point charges. The distance between their centre is again kept 0.1 m ; then the force of repulsion will

Question # 24

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

Question # 25

The capacity of a parallel plat capacitor depends on the

Question # 26

Two electric bulbs of 200 W and 100 W have same voltage. If R1and R2be their resistance respectively then

Question # 27

A ten ohm electric heater operates on a 110 V line. Calculate the rate at which it develops heat in watts

Question # 28

The conductivity of a superconductor is

Question # 29

A current of 1.6 A is passed through a solution of CuSO4. How many Cu2+ions are liberated in one minute?

Question # 30

If 2.2 kilowatt power is transmitted through 1 10 ohm line at 22000 volt, the power loss in the form of heat will be

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 Which of the following does not obey ohm's law?
A. Copper
B. Al
C. Diode
D. None
2 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
3 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
4 Electron volt is the unit of.
A. Potential difference
B. Energy
C. Resistance
D. Capacitance
5 If the distance of separation between two chares is increased, the electrical potential energy of the system will
A. Increase
B. Decrease
C. May increase or decrease
D. Remain the same
6 A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is
A. Zero
B. 0.5Ω
C. 1.1Ω
D. 5.0Ω
7 The potential difference across each resistance in series combination is
A. same
B. different
C. zero
D. none of these
8 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
9 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
10 The ratio of the gravitational force Fgto the electrostatic force Febetween two electrons at the same distance apart is approximately
A. 9.8
B. 24 x 1019
C. 24 x 1042
D. 24 x 10-44

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