Question # 1

Concept of electric field lines was given by:

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Michelson

Henry

Michael faraday

Oersted

The electrical intensity is equal to:

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-Δr/Δv

Δv/Δr

Δv/Δv

-Δv/Δr

The number of electrons in one coulomb charge is equal to

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6.2 x 10¹⁸ electrons

Zero electrons

1.6 x 10^-22 electrons

6.2 x 10²¹ electrons

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

Electric flux is a:

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Scalar quantity

Vector quantity

Variable quantity

None of these

A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, Then

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The charge in the plates reduces and potencial difference increase

Potencial difference between the plates increase, stored energy decreases and charge remains the same

Potencial difference between the plates decreases, stored energy decreases and charge remains unchanged

None of them

Electron volt is the unit of.

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Potential

Potential difference

Electric current

Electric energy

Electric flux is a

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Vector quantity

Scalar quantity

Both (a) and (b)

None of above

If F1 and F2 are teh magnetic forces acting on a particle and electron respectively when moving perpendicular to the magnetic field then.

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F1=F2

F1>F2

F1<F2

F1 = 4F2

Coulomb /volt is called.

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Farad

Ampere

Joule

Henry

S.I unit of strength of electric field is

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J/C

C/V

V/C

N/C

The number of lines per unit area passing perpendicular through an area is called

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Flux

Electric intensity

Both (a) , (b)

None of these

In Millikan's oil drop experiment a charged particle of mass 'm' is in equilibrium in an will

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Zero

g/2

g

2g

A capacitor stores energy in the form of.

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Magnetic field

Heat energy

Electrical energy

Mechanical energy

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

The quantity time constant RC has units of.

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Charge

Time

Capacitance

Resistance

The electric flux through closed surface depends upon

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Charge

Medium

Geometry

Charge and Medium

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