Question # 1

If an object moves with speed of light, its mass will be.

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Zero

Maximum

Minimum

infinity

In case of reverse biasing, current is flown due to:

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Minority charge carriers

Majority charge carriers

Electrons

Protons

The reciprocal of decay construct lamda of a radioactive element is.

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Half life

Mean life

Curie

total life

If the medium between the charges is not free space then electrostatic force will.be

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Increase

Decrease

Remain same

None of these

The crystalline structure of NaCl is.

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Cubical

Hexagonal

Tri gonal

Tetragonal

Recently superconductor discovered is at temperature.

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110K

143K

16.3K

119K

The average gap for Germanium at 0K is

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1.12 ev

0.02 ev

6.72 ev

7.2 ev

Which one belongs to lepton's group

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Electron

Muons

Neutrons

All of these

X- ray diffraction reveals that these are

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Particle type

Wave type

Both wave and particle

None of above

In current carrying long solenoid the magnetic field produced does note depend upon

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of above

Magnetic lines of force are.

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Imaginary

Real

Perpendicular

In phase with electric lines of force

Electric flux is a:

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Scalar quantity

Vector quantity

Variable quantity

None of these

Depletion region carries.

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-ve charge

+ve charge

Ions

No charge

In Compton effect the photon behaves as a.

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Wave

Particle

Nucleon

Both a and b

A device that shows the visible path of ionizing particle is called.

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GM counter

Solid state detector

Scalar

Wilson cloud chamber

Automatic function of street light can be done by the use of.

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Inductor

Rectifier

Comparator

emf

The Basic circuit element in a D.C. circuits which controls the current and voltage is

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Resistor

Inductor

Capisitor

Transistor

Young's modulus for water's is

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Zero

1

2

3

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