Question # 1

For computation of electric flux, the surface area should be.

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Parallel

Flat

Curved

Spherical

The "toner" of photocopier is given:

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Positive charge

Negative charge

Remains neutral

All of above

Charge carriers in electrolytes are.

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Protons

Electrons

Holes

Positive and Negative ions

Farad is defined as

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"Coulomb/Volt

Ampere /Volt

Coulomb /Joule

Volt/Coulomb

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

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

The product of resistance and capacitanc eis.

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Velocity

Force

Acceleration

Time

If the potential difference across two plates of capacitor is doubled, then energy stored in it will be.

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Two times

Eight times

Four times

Remain same

A charge on 4 coulomb is in the field of intensity 4N/C the force on the charge is.

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Uniform

Non uniform

Weak

Strong

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

A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:

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1884 ke V

1/1840 keV

1 keV

920 keV

The negative of the potential gradient is

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Electrostatic force

Electromotive force

Potential difference

Electric field intensity

The photo copying process is called

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Xerography

Inkjet Printer

Both (a) and (b)

None of these

A one microfarad capacitor of a TV is subjected to 4000 V potencial difference.The energy stored in capacitor is:

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8 j

16 j

4 x 10^-3j

2 x 10^-3j

Selenium is

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Insulator is dark

Insulator in light

Conductor in dark

Semi conductor in dark

S.I unit of strength of electric field is

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J/C

C/V

V/C

N/C

If both the magnitude of charges and distance between them is doubled, then coulomb's force will be.

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Doubled

Hlaf

Remain same

One fourth

The fact that electric field exist in space around an electrical charge is

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Electrical property

Gravitational property

Intrinsic property of nature

Extrinsic property of nature

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