Question # 1

All motions are

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Absolute

Uniform

Relative

Variable

Sensitivity of a galvanometer can be increased by

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Decreasing the value of torsional couple

Decreasing number of turns

Decreasing area of plane of coil

Decreasing magnetic field

The expression P = VI hold only when current and voltage are.

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In phase

Out of phase

At right angle to each other

At angle of 120 ^o

The Si unit of Mutual inductance is:

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VA^-1S^-1

VAS^-1

VSA^-1

ASV^-1

Resistance of choke is

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zero

Large

Very small

Infinite

The velocity of electron moving is 1st orbit of hydrogen atom is:

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2.09 x 10⁶ ms^-1

2.18 x10⁶ ms^-1

2.19 x 10⁶ ms^-1

3.18 x10⁶ ms^-1

Paschen series lies in the

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Far ultraviolet region

Visible region

Ultraviolet region

Inferred region

The materialization of energy take place in the process of.

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Photo electric effect

Compton Effect

Pair production

Annihilationof matter

Gamma radiations are emitted due to:

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De-excitation of atom

De-excitation of nucleus

Excitation of atom

Excitation of nucleus

The dead time of G.M tube is.

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10^-1 sec

10^-6sec

10^-4sec

10^-8sec

Mass of meason is

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Greater then proton

Less than proton

Equal to proton

Equal to neutron

Gamma rays from cobalt -60 are used for treatment of.

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Circulation of blood

Cancer

Heart Attack

Thyroid glands

Self inductance of a long solenoid is given by

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None of the above

If the length and number of turns of a solenoid are doubled strength of magnetic field with.

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Be doubled

Become half

Not change

Be four time

The critical temperature of mercury is.

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1.18 K

4.2 K

3.72 K

7.2 K

Ampere's law is applicable to:

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Circular path

Rectangular path

To any closed path

Nonwe of these

Which one is not present in A.C. generator.

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Armature

Magnet

Slip rings

Commutator

The most useful tracer is.

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Strontium -90

Iodine -31

Cobalt -60

Carbon -14

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