Question # 1

Which factor does not affect the conductivity of PN-Junction diode.

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Doping

Temperature

Voltage

Pressure

The device which allows only the flow of D.C. is.

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Capacitors

transformer

Inductor

Generator

The sum of positive and negative peak value called.

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R.M.S. value

P-P value

Peak value

Average value

I amu =

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9.31 MeV

931 MeV

9.031 MeV

None of above

the core of transformer is laminated so reduce.

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Magnetic loss

Hysteresis loss

Eddy current loss

Electric loss

For workers in nuclear facilities is, a weekly does of is normally considered safe

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1.0 msv

5.0 msv

2.0 msv

3.0 msv

the number of terminals in a semiconductor diode are

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2

3

4

5

The motional emf depends upon the

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Length of conductor

Speed of conductor

Strength of magnet

All of these

The first orbit in the hydrogen atom has a radius.

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0.53 nm

0.053 nm

0.0053 nm

0.00053 nm

Soft magnetic material is

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Sodium

Steel

Iron

Copper

Self induction does not depend on

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Number of turns of the coil

Area of cross section of the core

Nature of material of the core

Current through inductor

Vrms =

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0.7V_∘

0.07V_∘

0.007V_∘

0.75V_∘

The mass of beta particle is equal to the mass

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Proton

Neutron

Electron

Photon

Greater concentration of impurity is added in.

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Base

Emitter

Collector

LED

Transistor was invented by:

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Bardeen

Micheal faraday

Lenz

Newton

the current which flows from a point at higher. potential to point at lower potential is called.

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Electric current

Conventional current

Either of these

None of above

Which type of impurity is to be added to a pure semi conductor crystal to provide holes.

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Monovalent

Trivalent

Tetravalent

Pentavalent

First spectral series of hydrogen atom was discovered by

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Lyman

Rydberg

Balmer

Paschen

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