Question # 1

The potential difference between the top and bottom of a cloud chamber is of the order of

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290 v

400 v

1 kv

None of above

Concept of the electric field lines is introduced by

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Coulomb

Faraday

Einstein

Joseph henry

If the potential difference across two plates of capacitor is doubled, then energy stored in it will be.

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Two times

Eight times

Four times

Remain same

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

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Filter

Amplifier

Resistor

Transistor

A device used for detection of current is called.

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Inductor

Voltmeter

Capacitor

Galvanometer

The drift velocity is of order:

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10^-13m/s

10³ m/s

10^-3m/s

10^-4m/s

Maximum Compton shift is observed at.

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30^oC

90^oC

45^oC

180^oC

The number of neutrons in Li are

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2

3

4

7

If the following particle have the same energy, which particle has the shortest wave length.

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alpha particle

Neutron

Beta particle

Proton

For workers in nuclear facilities is, a weekly does of is normally considered safe

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1.0 msv

5.0 msv

2.0 msv

3.0 msv

The sensitivity of Galvanometer can be increased by:

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Increasing C/BAN factor

Decreasing C/BAN factor

Increasing angle θ

All of above

When back emf in motor is zero, it draws.

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Zero current

Minimum current

Maximum current

Steady current

Cobalt -60 is the source for

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Alpha rays

Gama rays

Beta rays

Neutron

Which one is not a crystalline solid.

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Zinc

Copper

Nylon

None of these

A photon while passing thorugh a magnetic field are deflected towards:

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North pole

South pole

Are ionized

None of these

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

1 amu is equal to

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1.0606 x 10^-27 kg

1.66 x 10^-31 kg

1.66 x 10^-34 kg

1.66 x 10^-19 kg

If both the length and radius of the rod are doubled, then the modulus of elasticity will:

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Increase

Decrease

Remains the same

Doubled

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