Question # 1

If D.C. input for step up transformer, the output is

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Zero

High

Low

May be high or low

The Si unit of Mutual inductance is:

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VA^-1S^-1

VAS^-1

VSA^-1

ASV^-1

Which one belongs to lepton's group

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Electron

Muons

Neutrons

All of these

Hydrogen atom spectrum does not lie in

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Ultraviolet region

Visible region

Infrared region

X ray region

In full wave rectification number of diodes required are equal to.

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2

3

4

5

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

Magnetic effect of current is used in.

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Toaster

Electric iron

Electric motor

D.C. Battery

The brightness of the spot of CRO screen is controlled by.

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Anode

Cathode

Grid

Deflecting plates

When a nucleus emits alpha particle its atomic mass decreases by

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1

2

3

4

The series in infrared region is:

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Paschen series

Bracket series

Pfund series

All of above

The uncertainty principle was given by

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De-Broglie

Heisenberg

Einstein

Max Planck

X-rays were discovered by

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Curie

Henry Becquerel

Rontgen

None of these

The movement of conductor in magnetic field produces electrical current was discovered in:

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1931

1731

1842

1831

Unit of impedance is:

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Ohm

Ohm^-1

no unit

Ohm m^-1

μ_∘(Ampere's constant) has value.

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4πx10^-7 WbA^-1m^-1

4πx10^-17 Wbm²

4πx10⁷ WbA^-1m^-1

4πx10-27 Wb/m²

A device which converts low voltage or current to high voltage or current is called.

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Transformer

AC generator

Amplifier

Rectifier

The quantity time constant RC has units of.

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Charge

Time

Capacitance

Resistance

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

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Parallel

Flat

Curved

Spherical

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