ECAT Pre Engineering Physics Chapter 12 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 12 Electrostatics

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

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Physics ECAT Pre Engineering Chapter 12 Electrostatics

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Question # 1

The concept of field theory was put forward by

Question # 2

Specific resistance of a wire depends upon

Question # 3

A parallel plate capacitor is first charged and then a dielectric slab is introduced between the plates. The quantity that remains unchanged is

Question # 4

The speed of randomly moving electrons depends upon

Question # 5

One coulomb per second is equal to

Question # 6

One joule is equal to

Question # 7

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

Question # 8

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

Question # 9

A metal plate of thickness half the separation between the capacitor plates of capacitance C is inserted. The new capacitance is

Question # 10

The liquid which conduct current is known as

Question # 11

A piece of fuse wire melts when a current of 15 ampere flows through it. With this current. If it dissipates 22.5 W, the resistance of fuse wire will be

Question # 12

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

Question # 13

Ohm is the unit of

Question # 14

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

Question # 15

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

Question # 16

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

Question # 17

Solar cell converts sunlight directly into

Question # 18

The earth's potential is taken as

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

The SI unit of conductivity is

Question # 25

The resistance of the given conductor can be increased by

Question # 26

Cause of heat production in a current carrying conductor is

Question # 27

In a charged capacitor the energy is stored in

Question # 28

Electron volt is the unit of.

Question # 29

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

Question # 30

A 50 volt battery is connected across 10 ohm resistor. The current is 4.5 A. The internal resistance of the battery is

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The SI unit of conductivity is
A. ohm-m
B. ohm-1m-1
C. ohm-m-1
D. ohm-1m
2 Solar cell converts sunlight directly into
A. potential energy
B. thermal energy
C. mechanical energy
D. electrical energy
3 Specific resistance of a wire depends upon
A. Length
B. Cross-section area
C. Mass
D. None
4 The minimum charge on any object can not be less than
A. 1.6 x 10-19C
B. 3.2 x 10-19C
C. 1.0 C
D. 4.8 x 10-19C
5 Ohm established a relation between
A. voltage and resistance
B. voltage and charge
C. voltage and current
D. voltage resistance and charge
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 charge per unit time through any cross-section of a conductor is called
A. capacitance
B. electric power
C. current
D. potential difference
8 The SI unit of capacitance is
A. Farad
B. Henry
C. Ohm
D. Volt
9 Which of the following represents an electric current?
A. C-1
B. CS-1
C. J.S-1
D. dynes-1
10 The liquid which conduct current is known as
A. heating effect
B. chemical energy
C. electrolyte
D. ohm's law

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