Question # 1

The special theory of relativity based on.

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One postulate

Two postulates

Three postulates

Four postulates

A positron is an anti particle of.

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Proton

Electron

Neutron

Photon

SI unit of hennery which is.

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VSA-1

VS-1 A

VS-1A-1

VSA

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

Self induction does not depend on

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Number of turns of the coil

Area of cross section of the core

Nature of material of the core

Current through inductor

Induced emf in A.C. generator can be increased by

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Decreasing area of coil

Decreasing magnetic field

Increasing area of coil

Slowing down speed of coil

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If the ionization energy of hydrogen atom is 13.6 eV, its ionization potential will be

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136.0 volt

3.0 volt

13.6 volt

None of these

The amount of energy equal to 1.6 x 10^-18 J is called.

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One volt

One milli volt

One electron volt

One mega electron volt

Base of transistor is of order:

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10^-11m

10⁶m

10^-8m

10^-6m

If 1 x 10⁷ electrons passes through a conductor in 1.0 micro second , then the current is.

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2 A

1.6 A

2.6 x 10^-6 A

1.6 x 10^-6 A

Out of the following which material is brittle.

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Wrought iron

Copper

Tungsten

High steel carbon

The dimensions of Plank's constant is same as that of.

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Energy

Power

Acceleration

Angular momentum

The motional emf is give by

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qvB

IBL

eBL

vBL

In current carrying long solenoid the magnetic field produced does not depend upon.

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The radius of solenoid

Number of turns per unit length

Current flowing through solenoid

All of the above

A step up transformer is used 120 V line to provide 240 V. If primary coil has 100 turns the number of turns is secondary is.

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50

100

150

200

The stopping potential for a certain metal is 10 volts. Thus work function for the cathode is.

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10 J

1.6 X 10^-18 J

1.6 X 10^-19 J

1.6 X 10³⁰ J

Minority carriers in P-Types , substances are.

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Electrons

Protons

Holes

Neutrons

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