Question # 1

The mass of beta particle is equal to the mass

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Proton

Neutron

Electron

Photon

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

Which of the following is similar to electron.

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Beta particle

Alpha particle

Neutron

Proton

Which of the following basic force is able to provide an attraction between two neutrons:

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Electrostatic and nuclear b

Electrostatic and gravitational

Gravitational and strong nuclear

Only nuclear force

Controlling rods inserted into the reactor are of metal:

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Aluminium

Cadmium

Magnesium

Copper

Nuclear fission chain reaction is controlled by using.

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Cadmium rods

Iron rods

Platinum rods

Steel rods

I amu =

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9.31 MeV

931 MeV

9.031 MeV

None of above

Hydrogen bomb is an example of.

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Nuclear fission

Nuclear fusion

Chain reaction

Chemical reaction

The unit of radioactivity is:

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Bequerel

Henry

Pascal

Joule

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

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

Which one belongs to lepton's group

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Electron

Muons

Neutrons

All of these

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

The first atomic reactor was introduced by

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Currie

Enrico Fermi

Newton

Bohr

James chadwick discovered:

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Proton

Positron

Neutron

Electron

In Wilson cloud chamber, if tracks are thick, straight and continuous, then particle is

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a-particles

ß-particles

Y-rays

All

The activity of radioactive sample

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Is constant

Increases with time

Decreases linearly with time

Decreases exponentially with time

Half life of Uranium -239 is

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26.5 minutes

24.5 minutes

25.5 minutes

23.5 minutes

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