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

Ohm established a relation between

Question # 2

The fractional change in resistance per kelvin is known as

Question # 3

The electric potential at the surface of an atomic nucleus (Z = 50) of radius 9.0 x 10-15 is

Question # 4

If an electron of charge 'e' is accelerated through a potential difference V., it will acquire energy

Question # 5

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

Question # 6

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

Question # 7

In RC series circuit the time during which the capacitor acquires 0.63 times the equilibrium charge is called

Question # 8

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

Question # 9

The material in the form of wire or rod or plate which leads the current into or cut of the electrolyte is known as

Question # 10

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

Question # 11

The liquid which conduct current is known as

Question # 12

If we increase the distance between two plates of the capacitor, the capacitance will

Question # 13

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

Question # 14

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

Question # 15

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

Question # 16

The value of electrical constant of proportionality k is

Question # 17

Electric flux is defined by the relation

Question # 18

The graphical representation of ohm's law is

Question # 19

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

Question # 20

The SI unit of electric field intensity is

Question # 21

Coulomb's force between two point charges depends upon

Question # 22

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

Question # 23

The relation V = IR represents

Question # 24

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

Question # 25

The earth's potential is taken as

Question # 26

The charge carriers in electrolyte are positive and negative

Question # 27

Battery is charged in motor cars, which is based on

Question # 28

Which one of the following has larger value of relative permitivity Erat room temperature?

Question # 29

A cube of metal is given a positive charge Q. For the above system, which of the following statements is true?

Question # 30

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The unit of conductance is
A. ohm
B. meter
C. mho
D. ohm-meter
2 A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor
A. Increases
B. Decreases
C. Remain unchanged
D. Becomes infinite
3 Two point charges A and B separated by a distance R attract each other with a force of 12 x 10-3N. The force between A and B when the charges on them are doubled and distance is halved
A. 1.92 N
B. 19.2 N
C. 12 N
D. 0.192 N
4 A wire is bent into a ring of radius R is given a charge q. The magnitude of the electrical field at the centre of the ring is
A. Two
B. 1/2
C. Zero
D. 3/2
5 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
6 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
7 A one microfarad capacitor of a TV is subjected to 4000 V potential difference. The energy stored in capacitor is
A. 8 J
B. 16 J
C. 4 x 10-3J
D. 2 x 10-3J
8 The SI unit of permitivity is
A. Nm2C2
B. N-1m-2C2
C. NmC2
D. Nm2C-1
9 The electric lines of force are
A. Imaginary
B. Physically existing everywhere
C. Physically existing near the charge
D. All of the above
10 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

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