Question # 1

The net charge on a capacitor magnitude of charge of charge

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Infinity

2 q

Q/2

Zero

The leV =

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1.6x10-19C

1.6x10-11J

1.6x10-19J

1.6x10-11C

For which material medium, force between two charged particles is maximum.

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Ammonia

Germanium

Mica

Teflon

Identify the practical application of electrostatic force.

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Inkjet printer

x rays

Laser

A.C. Generator

If the separation between the plates of a capacitor is doubled then its capacitance become.

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Double

Half

One fourth

Three times

Electric potencial of earth is taken to be zero because the earth is good:

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Semiconductor

Conductor

Insulator

Dielectric

Electric intensity due to an infinite sheet of charge is:

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∂/2ε_∘

∂/rε_∘

∂/r2ε_∘

none of these

If the medium between the charges is not free space then electrostatic force will.be

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Increase

Decrease

Remain same

None of these

Which material should be inserted between the plates of a capacitor in order to increase its capacitance.

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Copper

Mica

Iron

Tin

Metals are good conductors of electricity because they have

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Large number of bounded electrons

Small number of electrons

Large number of free electrons

Small number of free electrons

Which one is photo conductor.

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Copper

Selenium

Mercury

Aluminium

Coulomb /volt is called.

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Farad

Ampere

Joule

Henry

Concept of the electric field lines is introduced by

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Coulomb

Faraday

Einstein

Joseph henry

Closeness of the electric field lines is the measure of.

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Direction of field

Strength of field

Potential difference

Uniformity of field

Gauss's law can only be applied to.

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A curved surface

A flat surface

A closed surface

A surface of any shape

The amount of energy equal to 1.6 x 10^-18 J is called.

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One volt

One milli volt

One electron volt

One mega electron volt

Electric flux is a

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Vector quantity

Scalar quantity

Both (a) and (b)

None of above

The relative permitivity of air is

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79.5

1.006

1.06

1.0006

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