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

Surface density of charge is defined as

Question # 2

The dot product of electric field intensity E and vector area A is called

Question # 3

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

Question # 4

The concept of field theory was put forward by

Question # 5

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

Question # 6

A car battery has e.m.f 12 volt and internal resistance 5 x 10-2ohm. If it draws 60 ampere current, the terminal voltage of the battery will be

Question # 7

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 # 8

Resistor is a device which convert electric energy to

Question # 9

A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is

Question # 10

Electron volt is the unit of

Question # 11

One electron volt is equal to

Question # 12

The capacity of a parallel plat capacitor depends on the

Question # 13

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

Question # 14

A charge of 0.1 c accelerated through a potential difference of 1000V acquires kinetic energy

Question # 15

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

Question # 16

If the length of the conductor is double and its cross sectional area is halved, its conductance will

Question # 17

One joule is equal to

Question # 18

The speed of randomly moving electrons depends upon

Question # 19

The colour sequence in a carbon resistor in red, brown, orange and silver. The resistance of the resistor is

Question # 20

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

Question # 21

In a charged capacitor the energy is stored in

Question # 22

In a voltmeter the conduction takes place due to

Question # 23

The unit of resistance is

Question # 24

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

Question # 25

Resistance of a conductor depends upon

Question # 26

A 100 W, 200 V bulb is connected to a 160 volts supply. The actual power consumption would be

Question # 27

The substances whose resistance decreases with the increase in temperature these substances have coefficient of

Question # 28

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

Question # 29

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

Question # 30

One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The thermistors are usually made of
A. Metals with low temperature coefficient of resistivity
B. Metals with high temperature coefficient of resistivity
C. Metal oxides with high temperature coefficient of resistivity
D. Semi conducting materials having low temperature coefficient of resistivity
2 If 2.2 kilowatt power is transmitted through a 10 ohm line at 22000 volt, the power loss in the form of heat will be
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
3 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?
A. Zero
B. 5μC m-2
C. 20μC m-2
D. 8μC m-2
4 Resistor is a device which convert electric energy to
A. Heat energy
B. Chemical energy
C. Elastic energy
D. All of the above
5 A medium of dielectric constant 'K' is introduced between the plates of parallel plate condenser. As a result its capcitance
A. Increase k time
B. Decreases k times
C. Decreases 1/K times
D. Remains unchanged
6 Which of the following represents an electric current?
A. C-1
B. CS-1
C. J.S-1
D. dynes-1
7 The unit of resistivity is
A. ohm
B. ohm-m2
C. ohm-meter
D. ohm-m-1
8 The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as
A. voltmeters
B. resistance
C. electrode
D. current
9 If one volt is needed to cause a current of one ampere to flow in a conductor, its resistance is
A. one ohm
B. one joule
C. one volt
D. one ampere
10 The resistivity of a substance depends upon the
A. length
B. mass
C. area
D. temperature

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