Question # 1

The Si unit of Mutual inductance is:

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VA^-1S^-1

VAS^-1

VSA^-1

ASV^-1

The existence of positron was discovered in:

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1929

1928

1931

1933

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

In RLC circuit the energy is dissipated in

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R only

R and L

R and C

L and C

What is the co-efficient of mutual inductance, when the magnetic flux changes by 2 x 10^-2 Wb, and change in current is 0.01 A?

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2 H

3 H

1/2 H

Zero

The potential difference across the depletion region of germanium is.

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0.3 V

0.5 V

0.7 V

0.8 V

The negative of the potential gradient is

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Electrostatic force

Electromotive force

Potential difference

Electric field intensity

One of the applications of electrostatic induction is

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Laser

Photocopier

X ray machine

Wilson cloud chamber

Commentator was invented by

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Henry

Ousted

Maxwell

William sturgeon

A battery is used in

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ohmmeter

Ammeter

Galvanometer

Voltemeter

The term invertor is used for.

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NOR gate

XNOR gate

NAND gate

NOT gate

Closeness of the electric field lines is the measure of.

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Direction of field

Strength of field

Potential difference

Uniformity of field

In a certain circuit, I_{B = 40 µA,}I_C= 20 mA

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450 amp

0.45 amp

5 m amp

500 amp

Example of ductile substance is.

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Glass

Wood

Lead

Oxygen

Magnetic flux density is measured in

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Weber

Weber/m2

Tesla -m

Gauss

In Compton scatting, the value of shift is equal to Compton's wavelength, when X-rays is scattered at the angle of.

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90^oC

Zero

120^oC

45^oC

Metals are good conductors of electricity because they have

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Large number of bounded electrons

Small number of electrons

Large number of free electrons

Small number of free electrons

The radioactive decay obeys the law

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