Question # 1

The critical temperature of Aluminum is.

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3.72 K

1.18 K

7.2 K

8.2 K

A positron is a particle having.

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Mass equal to electron

Charge equal to electron

Mass equal to mass of electron but charge opposite to charge of electron.

Mass equal to proton

To convert a galvanometer into an ammeter, we connect with it a

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Shunt resistance

Low value parallel

Low value by pass resistor

All of above

The unit of Rh is.

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ms-1

m

m²

m^-1

For step down transformer

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Ns>Np

Np > Ns

Ns = Np

Ns > > > Np

Grid in cathode ray oscilloscope controls.

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Number of electron

Temperature of filament

Frequency of electron

Energy of electrons

If both the length and radius of the rod are doubled, then the modulus of elasticity will:

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Increase

Decrease

Remains the same

Doubled

A PN junction can not be sued a.

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Rectifier

Amplifier

Detector

LED

A semiconductor in its extremely pure form is known as:

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Intrinsic

Extrinsic

Both a and b

None of above

The acceleration of an electron of mass m and charge e, moving with uniform speed v at right angles to a magnetic field of flux density B, is given by

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Bevm

Controlling rods inserted into the reactor are of metal:

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Aluminium

Cadmium

Magnesium

Copper

The unit of magnetic induction B is

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Coulomb

Ampere

Coulomb/ampere

Weber/m²

The Si unit of Mutual inductance is:

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VA^-1S^-1

VAS^-1

VSA^-1

ASV^-1

For electromagnetic waves, Maxwell generalized

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Gauses law for magnetism

Gauses law for eletricity

Fradays law

Amperes law

When charge particle enter perpendicular to magnetic field, the path followed by it is:

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A helix

A circle

Straight line

Ellipes

The binding energy per nucleon is maximum for

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Helium

Iron

Potassium

Radium

One of the applications of electrostatic induction is

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Laser

Photocopier

X ray machine

Wilson cloud chamber

NAND gate represented by:

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X = A. B

X = A+B

X= A.B

X=|A+B|

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