Question # 1

The number of protons in any atom are always equal to the number of

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Neutrons

Electrons

Positrons

Mesoris

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

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

Various types of cancer are treated by

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Carbon -14

Nickel -63

Cobalt -60

Strontium -90

Which pair belongs to hadrons.

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Protons and Neutrons

Neutrons and electrons

Photons and electrons

positrons and electrons

When a nucleus emits an alpha particle, its atomic mass decreases by

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1

2

3

4

The unit of radioactivity is:

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Bequerel

Henry

Pascal

Joule

Charge on an electron was determined by

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Ampere

Millikan

Maxwell

Bohr

Cosmic rays consist of

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Protons

High energy photons

Positron

All of above

The place for soring the nuclear waste is

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Ocean

Damping in earth

Damping in desert

Bottom of old salt mines

The charge of an alpha particle is equal to

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-e

+e

-2e

2e

Controlling rods inserted into the reactor are of metal:

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Aluminium

Cadmium

Magnesium

Copper

The charge on Beta particle is

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+e

-e

-2e

None of these

Subatomic particles are divided into groups.

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Photon

Laptons

Hadrons

All of these

By emitting Beta particle and gama particle simultaneously the nucleolus changes in its charges by

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N

N/2

N/4

3N/4

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

Low level radiations effects

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Less of hair

Ulceration

Drop of white blood cells

All

Mass equivalent of 931 MeV energy is:

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6.02 x 10^-23 kg

1.766 x 10^-27kg

2.67 x 10^-29kg

6.02 x 10^-87kg

The number of neutrons in Li are

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2

3

4

7

X -rays are similar in nature to.

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Gama rays

Beta rays

Alpha rays

Cathode rays

The energy of photon for photoelectric effect is less than

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1 MeV

2 MeV

5 MeV

8 MeV

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

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