Question # 1

If a charge body moved against the electric field it will again

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Potential energy

K.E

Mechanical Energy

Electric potential energy

The toner of printer is given

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Positive charge

Negative charge

Neutral

First positive then negative

Selenium is a

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Insulator

Photoconductor

Conductor

First insulator then conductor

An electric field cannot deflect

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X-rays

a-particles

ß-particles

None of these

Force per unit charge is called:

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Gravitational force

Electric field intensity

Coulomb's force

None of these

The force of Neutron due to field of 10² N/C is.

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1.6 x 10^-17N

1.6 x 10^-19N

Zero

1.6 x 10^-21N

The electric field in some region of of space is uniform in magnitude and direction. Which one of the following five statements best desccribes the volume charge density (ρ) , in this region of space?

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ρ = 0

ρ decreases linearly in the direction of the electric field

ρ increases linearly in the direction of the electric field

ρ has a uniform value throughout the region

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

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

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

The product of resistance and capacitanc eis.

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Velocity

Force

Acceleration

Time

Due to polarization, electric field E.

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Increase

Decrease

First increases then decreases

Remain same

One joule is equal to.

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1.6 x 10¹⁹ eV

1.6 x 10^-19 eV

6.25 x 10^-18 eV

6.25 x 10 ¹⁸ eV

Which one of the following is correct

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All of above

The work done is bringing a unit positive charge from infinity to that point in an electric field is called.

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Potential

Potential difference

Absolute potential

All of these

Drum of photocopier is made of.

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Copper

Aluminum

Nickel

Cobalt

SI unit of electric flux is.

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NmC¹

Nm^-1 C¹

Nm²C^-1

Nm³C²

Dielectric constant _εr for air is:

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1

1.006

1.0002

1.0006

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