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 electric flux is linked with a surface will be maximum when

Question # 2

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

Question # 3

The unit of resistance is

Question # 4

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 # 5

The earth's potential is taken as

Question # 6

The resistance of a conductor does not depend on its

Question # 7

A uniform resistance wire of Length L and diameter d has a resistance R. Another wire of same material has length, 4L and diameter 2d, the resistance will be

Question # 8

Three resistance 500,500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be

Question # 9

The electric field will be uniform

Question # 10

The graphical representation of ohm's law is

Question # 11

The electric lines of force are

Question # 12

The unit of intensity of electric field is

Question # 13

The fractional change in resistance per kelvin is known as

Question # 14

One electron volt is equal to

Question # 15

Ohm's law states that

Question # 16

The thermistors are usually made of

Question # 17

Electric generators which convert mechanical energy into

Question # 18

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

Question # 19

Consider a spherical shell of metal at he centre of which a positive point charge is kept

Question # 20

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

Question # 21

In a building, there are 15 bulbs of 40 watts, 5 bulbs of 100 watts, 5 fans of 80 watts and a heater of 1 kilowatt. The voltage of the electric main is 220 volts. The minimum efficiency of the main fuse of the building will be

Question # 22

The SI unit of electric field intensity is

Question # 23

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

Question # 24

The liquid which conduct current is known as

Question # 25

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

Question # 26

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

Question # 27

The relation between charge 'Q' and current 'I' is given by

Question # 28

The conductivity of a superconductor is

Question # 29

The minimum charge on any object can not be less than

Question # 30

Surface density of charge is defined as

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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 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
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 electric field will be uniform
A. Near a positive point charge
B. Near a negative point charge
C. Between two oppositely charged parallel metal plates
D. None of above
5 In bringing an electron towards another electron, electrostatic potential energy of system
A. Decreases
B. Increases
C. Remains uncharged
D. Becomes zero
6 The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is
A. 9 x 105V
B. 9 V
C. 8 x 106V
D. 80 V
7 Capacitance of two or more capacitors
A. Increases in series combination
B. Increases in parallel combination
C. Remains unchanged
D. None of the above
8 The concept of field theory was put forward by
A. Franklin
B. Kepler
C. Oersted
D. Michael Faraday
9 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
A. 1840 KeV
B. 1/1840 KeV
C. 1 KeV
D. 920 KeV
10 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

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