Question # 1

The mass of beta particle is equal to mass of.

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Protons

Electrons

Neutrons

Boron

GM counter uses

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Alcohol only

Bromine

argon

Neon and bromine

Nuclear fission chain reaction is controlled by using.

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Cadmium rods

Iron rods

Platinum rods

Steel rods

The mass of beta particle is equal to the mass

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Proton

Neutron

Electron

Photon

The building blocks of protons and neutrons are called.

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Ions

Electrons

Positrons

quarks

The energy equivalent of 1 kg of matter is about:

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10^-15 J

1 J

10^-12J

10^-17J

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

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

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Circulation of blood

Cancer

Heart Attack

Thyroid glands

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

When a nucleus emits alpha particle its atomic mass decreases by

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1

2

3

4

Both xenon and caesium each have:

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41 isotopes

36 isotopes

43 isotopes

33 isotopes

A radio active substance has a half life of four months. 3 -fourth of the substance will decay in:

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6 months

8 months

12 months

16 months

I amu =

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9.31 MeV

931 MeV

9.031 MeV

None of above

The quantity of U in the naturally occurring uranium is.

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0.2%

0.3%

0.7%

0.4%

Which one belongs to lepton's group

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Electron

Muons

Neutrons

All of these

Low level radiations effects

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Less of hair

Ulceration

Drop of white blood cells

All

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

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6332

7332

8332

9332

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