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

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

Question # 2

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 # 3

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

Question # 4

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 # 5

The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be

Question # 6

The resistance of a conductor does not depend on its

Question # 7

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

Question # 8

One coulomb of charge is created by

Question # 9

The energy required to charge a capacitor of 5μF by connecting D.C. source of 20 KV is

Question # 10

The resistance of the given conductor can be increased by

Question # 11

Which one of the following causes production of heat when current is set up in a wire?

Question # 12

Resistance of a conductor is increased, the currant will

Question # 13

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?

Question # 14

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

Question # 15

Potentiometer is more sensitive than voltmeter, because

Question # 16

A closed surface contains two equal and opposite charges. The net electric flux from the surface will be

Question # 17

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

Question # 18

The SI unit of capacitance is

Question # 19

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10Ωwhen a potential difference of 20 V is applied between its ends

Question # 20

The capacitance of a parallel plate capacitor depends upon

Question # 21

The resistance of an incandescent lamp is

Question # 22

The graphical representation of ohm's law is

Question # 23

The SI unit of current is

Question # 24

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

Question # 25

A conducting wire is drawn to double its length. Final resistivity of the material will be

Question # 26

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

Question # 27

The electric lines of force are

Question # 28

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

Question # 29

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

Question # 30

Thermocouple is an arrangement of two different metals

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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 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
3 If we increase the distance between two plates of the capacitor, the capacitance will
A. Increase
B. Decrease
C. Remain same
D. First increase then decrease
4 The substances whose resistance decreases with the increase in temperature these substances have coefficient of
A. positive temperature
B. negative temperature
C. absolute temperature
D. zero temperature
5 A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is
A. C
B. C/2
C. Zero
D. 2C
6 What is the current is a 2 x 106ohm resistor having a potential difference of 2 x 103volts?
A. 10-1A
B. 10-2A
C. 10-4A
D. 1 mA
7 The powers of tow electric bulbs are 100 W and 200 W. Both of them are joined with 220 V mains. The ratio of resistances of their filaments will be
A. 1 : 2
B. 2 : 1
C. 1 : 4
D. 4 : 1
8 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
A. 0.1 watt
B. 1 watt
C. 10 watt
D. 100 watt
9 One moving a charge of 20 coulombs by 2 cm, 2 J of work is done, then the potential difference between the points is
A. 0.1 V
B. 8 V
C. 2 V
D. 0.5 V
10 Electron volt is the unit of
A. Potential difference
B. Energy
C. Resistance
D. Capacitance

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