Question # 1

In current carrying long solenoid the magnetic field produced does not depend upon.

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of the above

Electromagnetic induction is exactly according to law of:

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Momentum

Charge

Energy

Mass

Nuclear fission was discovered by:

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Otto Hahn

Friz strassmann

Both a and b

Michaelson

With the speed of motor, magnitude of back emf

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Remain same

Increase

Decrease

First increases then decreases

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

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

Charge on an atom is:

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Positive

Negative

Neutral

None of these

Paschen series lies in the

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Far ultraviolet region

Visible region

Ultraviolet region

Inferred region

The application of mutual induction is a.

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D.C. motor

Radio

Television

Transformer

Recently superconductor discovered is at temperature.

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110K

143K

16.3K

119K

Choke consumes extremely small

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Current

Charge

Power

Potential

5 A of current flows through a conductor in 2 minutes, charge in the wire is.

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500 C

600 C

400 C

10 C

Curie temperature is a point where :

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Diamagnetism changes to paramagnetism

Paramagnetism changes to Diamagnetism

Ferromagnetism changes to paramagnetism

Paramagnetism changes to Ferromagnetism

Net charge enclosed by Gaussian surface is:

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zero

maximum

depend on intensity

none of all

Curie temperature is

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Differen for chromium oxide and cobalt

Same for chromium oxide and cobalt

Same for iron and cobalt

None of these

An AVO meter can also be called as.

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Digital multimeter

Digital voltmeter

Digital ammeter

Digital ohm meter

The potential barrier for silicon is.

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0.7 V

0.5 V

0.3 V

0.9 V

In 'N' type material, the minority charge carriers are.

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Free electrons

Holes

Protons

Mesons

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