Question # 1

Alpha particle carries a charge.

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-e

+2e

-2e

No charge

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

The activity of radioactive sample

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Is constant

Increases with time

Decreases linearly with time

Decreases exponentially with time

One joule of energy absorbed per kilogram of a body is

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Roentgen

Grey

Rem

Curie

A particles equal or greater in mass than of protons are called.

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Baryons

Leptons

Mesons

Quarks

Circulation of blood is studied by radio isotope.

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Cobalt -60

Phosphorus -32

Sodium -24

Iodine -131

The mass of proton in amu is:

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1.07276

1.7276

1.007276

1.0007276

The charge number of Ba is.

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197

141

56

85

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

Which pair belongs to hadrons.

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Protons and Neutrons

Neutrons and electrons

Photons and electrons

positrons and electrons

The building blocks of protons and neutrons are called.

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Ions

Electrons

Positrons

quarks

1 amu is equal to

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1.0606 x 10^-27 kg

1.66 x 10^-31 kg

1.66 x 10^-34 kg

1.66 x 10^-19 kg

In nuclear radiation , track of alpha particle is.

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Thin

Discontinuous

Erratic

Continuous

The number of Neutron is²³⁸U₉₂is

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92

238

146

330

The quantity of U in the naturally occurring uranium is.

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0.2%

0.3%

0.7%

0.4%

The first atomic reactor was introduced by

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Currie

Enrico Fermi

Newton

Bohr

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

The reciprocal of decay construct lamda of a radioactive element is.

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Half life

Mean life

Curie

total life

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