Question # 1

Wave nature of light appears in

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Pair production

Compton effect

Photo electric

Interference

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

Resistance of choke is

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zero

Large

Very small

Infinite

The unit of magnetic induction B is

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Coulomb

Ampere

Coulomb/ampere

Weber/m²

A sensitive galvanometer is

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Unstable

Stable

Moderate

Both B and C

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

The Lenz's law is also statement of:

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Law of conservation of mass

Law of conservation of charge

Law of conservation of energy

Law of conservation of momentum

An in cudutor may store energy in

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Its magnetic field

Its coil

Its electric field

A neighboring circuit

The electrons in one coulomb change is equal to.

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1.6 x 10^-19

2.25 x 10^-19

6.25 x 10^-18

6.25 x 10^-19

Energy stored in an inductor is:

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1/2L²I

1/2L²/I

_1/2LI²

1/2LI

A.C. can be converted into D.C. by

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An oscillator

Detector

An amplifier

Rectifier

The most useful tracer is.

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Strontium -90

Iodine -31

Cobalt -60

Carbon -14

The force on a charge particle moving parallel to magnetic field is:

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Maximum

Minimum

Zero

None of these

Which one of the following is polymeric solids

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Glass

Nylon

Copper

Zinc

To convert a galvanometer into a volt meter a high resistance is connected.

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In series

In parallel

In perpendicular

Along tangent

The torque in the coil can be increased by increasing:

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No. of turns

Current and magnetic field

Area of coil

All of the above

The anodes in cathode ray oscilloscope.

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Control number of waves

Control brightness of sept formed

Accelerate as well as focus beam

Negative potential w.r.t to chithode

The converses of annihilation of matter is:

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Photoelectric effect

Relativistic effect

Pair production

Compton effect

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