Question # 1

The unit of radioactivity is:

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Bequerel

Henry

Pascal

Joule

In nuclear radiation , track of alpha particle is.

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Thin

Discontinuous

Erratic

Continuous

Marie Curie and Pierre Curie discovered.

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Uranium

Uranium and Radium

Polonium and radium

Radium

Various types of cancer are treated by

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Carbon -14

Nickel -63

Cobalt -60

Strontium -90

GM counter uses

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Alcohol only

Bromine

argon

Neon and bromine

The mass of proton in amu is:

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1.07276

1.7276

1.007276

1.0007276

Subatomic particles are divided into groups.

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Photon

Laptons

Hadrons

All of these

Cosmic rays consist of

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Protons

High energy photons

Positron

All of above

The charge number of Ba is.

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197

141

56

85

Before and after nuclear reaction the number of protons and neutrons:

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Must be different

Must be decreased

Must be increased

Remains same

How many times, the alpha particle is more massive than electrons.

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6332

7332

8332

9332

There is no charge in A and Z of any radioactive element by the emission of.

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Alpha particle

Beta particle

Gama particle

X- rays

Gamma rays from cobalt -60 are used for treatment of.

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Circulation of blood

Cancer

Heart Attack

Thyroid glands

Which is true for both alpha particle and gama rays.

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They cause ionization in air

They can be deflected by electric field

They can be deflected by magnetic field

The y can penetrate a few millimeters of aluminium

The activity of radioactive sample

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Is constant

Increases with time

Decreases linearly with time

Decreases exponentially with time

When nitrogen is bombarded by alpha particles nitrogen nucleus changes into

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Oxygen

Carbon

Barium

Helium

The mass of beta particle is equal to the mass

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Proton

Neutron

Electron

Photon

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Physics ICS Part 2 Chapter 21 Online MCQ's Test MCQs With Answers

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