Question # 1

When a nucleus emits an alpha particle, its atomic mass decreases by

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1

2

3

4

1 Henry =

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VSA^-1

VS^-1A^-1

V^-1SA

VSA^-2

The SI Unit of magnetic induction is.

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Weber

Tesla

Gauss

Newton

The unit of impedance is

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Farad

Henry

Tesla

Ohm

Antiparticle of electron is.

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proton

Photon

Positron

Neutron

By emitting Beta particle and gama particle simultaneously the nucleolus changes in its charges by

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N

N/2

N/4

3N/4

In carbon resistors, then value of Blue colour is.

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6

7

8

9

The Unit of decay constant.

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Second

(second)-1

m-1

mk

Pulsating output of full wave rectifier can be made smooth by using circuit called.

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Filter

Amplifier

Resistor

Transistor

The head produced by the passage of current through a resistor is.

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H= I²Rt

H = IR²t

H = 1/Rt

H = I²/Rt

Which pair belongs to hadrons.

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Protons and Neutrons

Neutrons and electrons

Photons and electrons

positrons and electrons

The existence of positron in 1928 was predicted by

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Anderson

Dirac

Chadwick

Plank

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

In 'N' type material, the minority charge carriers are.

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Free electrons

Holes

Protons

Mesons

An electron enters the magnetic field at right angle from left, B is into paper. The electron will be deflected.

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upward

To ward right

Down ward

Toward left

Magnetic flux density at a point due to current carrying coil is determined by

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Ampere's law

Faraday's law

Lenz's law

Gauss's law

A light emitting diode emits light only when

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Reverse biased

Forward biased

Unbiased

None of these

Galvanometer is sensitive when C/BAN is

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zero

Large

small

Negative

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