Question # 1

The mass of protons is:

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1.675 x 10^-27 kg

1.693 x 10^-27 kg

1.673 x 10^-31 kg

1.673 x 10^-27 kg

A proton consists of quarks which are.

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Two up, one down

One up, two down

All up

All down

Absorbed Dose 'D' is defined as

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m/E

E/C

C/m

E/m

A pair of quark and anti quark makes a.

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Meason

harden

Lapton

Baryon

Half life of radon gas is

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3.8 minutes

3.8 days

3.8 months

3.8 years

Which of the following are not hadrons.

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Muons

Mesons

Positrons

Neutrons

The binding energy for_________ is maximum.

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Copper

Glass

Iron

Aluminum

Cobalt -60 is the source for

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Alpha rays

Gama rays

Beta rays

Neutron

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

The particles equal in mass but greater than proton are.

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Mesons

Baryons

Leptons

Hadrons

The radioactive decay obeys the law

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

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Neutrons

Electrons

Positrons

Mesoris

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

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

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6332

7332

8332

9332

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

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1

2

3

4

Curie is unit of.

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Conductivity

Binding energy

Radioactivity

Resistivity

Cosmic rays consist of

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Protons

High energy photons

Positron

All of above

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

Electrons are

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Hadrons

Laptons

Quarks

Baryons

The charge on Beta particle is

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+e

-e

-2e

None of these

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

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