ECAT Pre Computer Science Chapter 12 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 12 Electrostatics

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

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ECAT Physics Chapter 12 Electrostatics

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Question # 1

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 # 2

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 # 3

The charge carriers in electrolyte are positive and negative

Question # 4

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

Question # 5

Specific resistance of a wire depends upon

Question # 6

If the two charges in Coulomb's law have double distance between them, then electric force

Question # 7

The SI unit of conductivity is

Question # 8

The SI unit of electric flux is

Question # 9

In a voltmeter the conduction takes place due to

Question # 10

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 # 11

The SI unit of permitivity is

Question # 12

The SI unit of capacitance is

Question # 13

The capacity of a parallel plat capacitor depends on the

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 12 Important MCQ's

Sr.# Question Answer
1 The charge carriers in gases are
A. electrons
B. ions
C. protons
D. ions and electrons
2 A wire of radius r has resistance R. If it is stretched to a wire of r/2 radius, then the resistance becomes
A. 2R
B. 4R
C. 16R
D. Zero
3 The electric flux is linked with a surface will be maximum when
A. The surface is held parallel to the electric field
B. The surface is held perpendicular to the electric field
C. The surface makes an angle of 45° with the electric field
D. All of the above
4 Which one of the following causes production of heat when current is set up in a wire?
A. Fall of electrons from higher orbits to lower orbits
B. Inter-atomic collisions
C. Inter-electron collisions
D. Collisions of conduction electron with atoms
5 In a charged capacitor the energy is stored in
A. Both in positive and negative charges
B. Positive charges
C. The edges of the capacitor plates
D. The electric field between the plates
6 Physicist George Simon ohm was a
A. German physical
B. French physicist
C. Chinese physicist
D. Russian physicist
7 When a dielectric material is introduced between the plates of a charged condenser the electric field between the plates
A. Decreases
B. Increases
C. No change
D. May increase or decresase
8 The electric flux from a closed surface
A. Is independent of the shape of the surface
B. Depends on the charge enclosed by the surface
C. Both a and b
D. None of the above
9 The fractional change in resistance per kelvin is known as
A. temperature coefficient
B. resistance coefficient
C. super temperature
D. critical temperature
10 Battery is charged in motor cars, which is based on
A. Chemical effect
B. Magnetic effect
C. Electric effect
D. None

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