Question # 1

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

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

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Semiconductor

Conductor

Insulator

Dielectric

The unit of impedance is

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Farad

Henry

Tesla

Ohm

The half life of radioactive elements depends upon

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Temperature

Nature of element

Amount of the radioactive substance

Pressure

X_L=

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2πfL

1/2πfL

2πfL

fL/2π

Electromagnetic induction is exactly according to law of:

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Momentum

Charge

Energy

Mass

A moving charge is surrounded by:

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2 Fields

3 Fields

4 Fields

None of these

What is the resistance of carbon resistor which has band brown black brown.

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100 Ohm

1000 Ohm

10 Ohm

1.0 Ohm

Depletion region carries.

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-ve charge

+ve charge

Ions

No charge

Which one is pentavalent impurity

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Boron

Gallium

Antimony

Indium

The reactance is the ratio of

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V_rms/I_rms

V_rms x I_rms

I_rms/V_rms

V_max x V_rms

A transistor has:

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Two regions

Three regions

Single regions

Four regions

Coulomb's force is:

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Conservative force

None conservative force

Similar to frictional force

None of the above

Radius of first orbit of an atom is r1= 0.053 nm, Radius of second orbit r2 will be.

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0.106 nm

0.212 nm

0.053 nm

0.53 x 10^-10 nm

A rheostat can be used as variable resistor as well as a-------------

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Potential divider

Current divider

Wheat stone bridge

Power divider

Specific resistance of a material depends upon.

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Length

Area

Temperature

Both A and B

1 kg mass will be equivalent to energy.

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9 x 10⁸ J

9 X 10¹² J

9 X 10¹⁶ J

9 X 10¹⁹ J

All motions are

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Absolute

Uniform

Relative

Variable

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