Question # 1

The number of neutrons in Li are

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2

3

4

7

The brightness of the spot of CRO screen is controlled by.

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Anode

Cathode

Grid

Deflecting plates

A.C. Generator based upon the

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Lenz's law

Maxwell's relation

Faradays law of electromagnet induction

Mutual induction

The mass of beta particle is equal to mass of.

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Protons

Electrons

Neutrons

Boron

Current passing through the coil of galvanometer

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CO/BAN

CoN /BA

NAB/CO

AN/BCO

A charged particle having charge 'q' is moving at right angle to magnetic field. The quantity which varies is.

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Speed

Kinetic energy

Path of motion

angular velocity

With the speed of motor, magnitude of back emf

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Remain same

Increase

Decrease

First increases then decreases

Kx -Xrays are produced due to transition of electron from.

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K to L shell

L to K shell

M to K shell

M to L shell

The Direction of induced current is always so as to oppose the change which causes the current, is:

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Faraday's law

Lenz's law

Ohm's law

Kirchhoff' s1ast rule

When gama rays are emitted, the nuclear mass.

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Decreases by 4 units

Does not change

Increases by 2 units

Increase by 1 unit

If the kinetic energy of a free electron doubles, its de Broglie wavelength changes by the factor.

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√2

1/√2

2

1/2

Photons emitted in inner shell transition are.

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Continuous X -rays

Discontinuous X rays

Characteristic X rays

Energetic X rays

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

Coulomb /volt is called.

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Farad

Ampere

Joule

Henry

The energy of photon for photoelectric effect is less than

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1 MeV

2 MeV

5 MeV

8 MeV

Energy produced due to fission of uranium atom is:

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500MeV

200MeV

700MeV

750MEV

NC-1 is the SI unit is

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Force

Charge

Current

Electric intensity

The total charge of any nucleus is:

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Ze

Z

Both a and b

None of above

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