Question # 1

The process of copying is:

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Axillugraphy

Chromatography

Xerography

Spectrography

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 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

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

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

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Semiconductor

Conductor

Insulator

Dielectric

The SI unit of relative permittivity is.

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Fm-1

C2N-1m-2

Nm2C-2

No unit

Two opposite point charge of same magnitude separated by distance 2d, electric potential mid way between them is.

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1 V

2 V

Zero

V/2

The electric field created by positive charge is:

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Radially outward

Circular

Radially inward

Zero

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

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

Electro encephalon graph is the diagnostic test for the working of.

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Eye

Heart

Brain

Lungs

A charge Q is divided into tweo parts q and Q-q and seperated by a distance R. The force of equilibrium between them will be maximum when:

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q=Q/4

q=Q/2

q=Q

None of these

the force between two charge is 28 N. If paraffin wax of relative permittivity 2.8 is introduced between the charges as medium, then the force reduces to.

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25 N

20 N

10 N

15 N

The "toner" of photocopier is given:

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Positive charge

Negative charge

Remains neutral

All of above

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

Concept of the electric field lines is introduced by

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Coulomb

Faraday

Einstein

Joseph henry

Electric flux is a

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Vector quantity

Scalar quantity

Both (a) and (b)

None of above

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

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