Question # 1

Self inductance of a long solenoid is given by

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None of the above

Presence of dielectric between two charges always.

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Reduces the electric force

Enhance the electric force

Does not effect electric force

Double the electric force

The main use of A.C is

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Minimum line losses

Long distance transmission

Stepping up to required voltage only

Steeping down to required voltage only

A voltmeter is always connected in

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Parallel

Series

Perpendicular

Straight line

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

e.m.f is the conversion of --------------- energy into electrical energy

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Chemical

Solar

Light

None of these

The peak value of A.C source is 20 A, then its rms value will be.

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14.1 A

10 A

20 A

28.2 A

The particles equal in mass but greater than proton are.

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Mesons

Baryons

Leptons

Hadrons

Which particle has larger range in air.

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Alpha rays

Gama rays

Beta rays

Neutron

The Weber is unit of measure of:

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Conductance

Electric current

Magnitic flux

Electric flux

A Current flowing towards the reader is denoted by.

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Cross

a bracket

A dot

Positive sign

Rutherford performed on experiment on a nuclear reaction in:

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1921

1981

1927

1932

During each cycle A.C. voltage reaches a peak value.

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Once

Twice

Thrice

Four time

SI unit of hennery which is.

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VSA-1

VS-1 A

VS-1A-1

VSA

Thermistor with high - ve temperature coefficient are very accurate for measuring low temperature especially near is.

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10 kelvin

70 kelvin

200 kelvin

35 kelvin

Semiconductors have conductivity of order:

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10^-8 to 10^-6 (Ωm)^-1

10^-6 to 10^-4 (Ωm)^-1

10² to 10⁵ (Ωm)^-1

10^-5 to 10^-7 (Ωm)^-1

A positron is an anti particle of.

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Proton

Electron

Neutron

Photon

Energy needed to produce an electron hole in solid state detector is.

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1 to 2 eV

3 to 4 eV

6 to 7 eV

8 to 9 eV

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