Question # 1

Various types of cancer are treated by

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Carbon -14

Nickel -63

Cobalt -60

Strontium -90

The SI unit of decay constant is

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m

m^-1

S^-1

Nm^-1

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 quantity of U in the naturally occurring uranium is.

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0.2%

0.3%

0.7%

0.4%

Energy needed to produce an electron hole in solid state detector is.

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1 to 2 eV

3 to 4 eV

6 to 7 eV

8 to 9 eV

The charge on Beta particle is

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+e

-e

-2e

None of these

1 gray is equal to.

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1 JKg-1

1KgJ-1

1JKg

1 JKg-2

Gamma radiations are emitted due to:

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De-excitation of atom

De-excitation of nucleus

Excitation of atom

Excitation of nucleus

Which one of the following is not affected by electric or magnetic field.

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Beta rays

Gama ryas

Alpha rays

Electron

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

The mass of beta particle is equal to mass of.

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Protons

Electrons

Neutrons

Boron

Subatomic particles are divided into groups.

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Photon

Laptons

Hadrons

All of these

The most abundant isotope of neon is:

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Neon 21

Neon 20

Neon 22

None of above

Radioactivity happen due to the disintegration of

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Nucleus

Mass

Electrons

Protons

The particles equal in mass but greater than proton are.

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Mesons

Baryons

Leptons

Hadrons

Cobalt -60 is the source for

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Alpha rays

Gama rays

Beta rays

Neutron

The binding energy per nucleon is maximum for

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Helium

Iron

Potassium

Radium

The amount of energy equivalent to 1 a.m.u is

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931.5 MeV

93.15 MeV

9.315 MeV

2.224 MeV

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