Question # 1

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

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

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Semiconductor

Conductor

Insulator

Dielectric

A capacitor is perfect in insulator for.

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Alternating current

Sparking current

Eddy current

Direct current

Charge on electron is

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1.6 x 10^-19 C

1.6 x 10¹⁹C

1.6 x 10^-17C

1.6 x 10¹⁷C

The net charge on a capacitor magnitude of charge of charge

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Infinity

2 q

Q/2

Zero

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

One of the applications of electrostatic induction is

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Laser

Photocopier

X ray machine

Wilson cloud chamber

The SI unit of relative permittivity is.

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Fm-1

C2N-1m-2

Nm2C-2

No unit

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

The toner of printer is given

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Positive charge

Negative charge

Neutral

First positive then negative

Farad is defined as

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"Coulomb/Volt

Ampere /Volt

Coulomb /Joule

Volt/Coulomb

Concept of electric field lines was given by:

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Michelson

Henry

Michael faraday

Oersted

The electric field lines are closer where the field is

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Strong

Weak

Uniform

Variable

Charge carriers in electrolytes are.

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Protons

Electrons

Holes

Positive and Negative ions

Force per unit charge is called:

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Gravitational force

Electric field intensity

Coulomb's force

None of these

Presence of dielectric between two charges always.

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Reduces the electric force

Enhance the electric force

Does not effect electric force

Double the electric force

One electron volt is equal to.

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1.6 x 10^-19 Joule

1.6 x 10^-19Coulomb

1.6 x 10^-12N

1.6 x 10¹⁸Joule

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