Question # 1

The Weber is unit of measure of:

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Conductance

Electric current

Magnitic flux

Electric flux

The highest value reached by the voltage or current in one cycle is called.

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Peak ot peak value

Peak value

Instantaneous value

Root mean square value

The mass of beta particle is equal to mass of.

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Protons

Electrons

Neutrons

Boron

The series in infrared region is:

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Paschen series

Bracket series

Pfund series

All of above

The reactance of inductor depends upon

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L

All of the above

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

Step up transformer is used.

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Step up D.C. voltage

Step up A.C. voltage

Step up both A.C and D.C.

Step up A.C. current

A° is the unit of:

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Energy

Length

Nuclear energy

Work

Electric potential at a distance ''r'' from ''q'' is:

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V_r = 1/54πε_∘q/r₂

Vr=1/4πε_∘²q/r

V_r=1/4πε_∘2q/r

V_r=1/4πε_∘q²/r

The temperature of core of nuclear reactor is:

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1100°C

1200°C

1300°C

1400°C

The phase difference between the current and voltage at resonce is:

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0

π

-π

π/2

Those materials whose resistivity becomes zero at certain temperature is called:

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Semiconductor

Super conductor

Conductor

Insulator

Potassium Cathodes in photocell emit electrons for a light.

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Visible

Infra red

Ultra violet

X rays

In CRO, the output waveform of time base generator is

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Circular

Square

Sinusoidal

Saw-toothed

The sensor of light is.

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Transistor

LED

Diode

Light dependent resistance

A rheostat can operate as.

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Amplifier

Potential divider

Oscillator

Transformer

If V_rms be the root mean square value of emf then its peak to peak value is given by

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the substances in which the atoms do not form magnetic dipoles are called.

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Diamagnetic

Para magnetic

Ferro magnetic

Crystal

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