Question # 1

Power dissipated in a pure inductor is.

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Large

Small

Infinite

Zero

Magnetic effect of current is used in.

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Toaster

Electric iron

Electric motor

D.C. Battery

The most common source of an A.C. Voltage is.

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Motor

Cell

Generator

Thermo couple

For ohmic device the graph between V and I is.

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A straight line

Curve

Hyperbola

Parabola

Energy released by conversion of 1 amu is

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200 MeV

931 MeV

233 MeV

243 MeV

Coulomb /volt is called.

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Farad

Ampere

Joule

Henry

In extrinsic semiconductors doping is of the order of.

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1 atom to 10⁴

1 atom to 10⁶

1 atom to 10⁸

1 atom to 10³

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

One electron volt is equal to.

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1.6 x 10^-19 Joule

1.6 x 10^-19Coulomb

1.6 x 10^-12N

1.6 x 10¹⁸Joule

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Lenz's law

Faraday's law

Ampere's law

None of these

The electric intensity at infinite distance from the point charge is

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Infinite

Zero

Positive

Negative

When the medium is insulator the elecrostatic force between the charges is

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Decreased

Zero

Increased

None of above

Resistance of choke is

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zero

Large

Very small

Infinite

If F1 and F2 are teh magnetic forces acting on a particle and electron respectively when moving perpendicular to the magnetic field then.

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F1=F2

F1>F2

F1<F2

F1 = 4F2

Which of the following has least hysteresis loop area.

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Steel

Wrought Iron

Soft Iron

Cobalt

The mass spectrum of naturally occurring neon shows the most abundant isotope has atomic mass.

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19

20

21

22

Substance which break just after the elastic limit is reached are called as.

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Ductile substances

Hard substances

Britto substances

Soft substances

Thermosouple is an arrangement of two different metals:

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Two convert heat energy into electrical energy

To produce more heat

To convert heat energy into chemical energy

To convert electrical energy into heat energy

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