Question # 1

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

Half life of radon gas is

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3.8 minutes

3.8 days

3.8 months

3.8 years

Materials can be identified by measuring their

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Mass

Half life

Both a and b

None of a,b,c

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

When gama rays are emitted, the nuclear mass.

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Decreases by 4 units

Does not change

Increases by 2 units

Increase by 1 unit

The total charge of any nucleus is:

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Ze

Z

Both a and b

None of above

Two down and one up quarks make

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Proton

Neutron

~~photon~~

Positron

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

Both xenon and caesium each have:

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41 isotopes

36 isotopes

43 isotopes

33 isotopes

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

The half life of radioactive elements depends upon

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Temperature

Nature of element

Amount of the radioactive substance

Pressure

Charge on an electron was determined by

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Ampere

Millikan

Maxwell

Bohr

Marie Curie and Pierre Curie discovered.

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Uranium

Uranium and Radium

Polonium and radium

Radium

Those elements whose charge number z is greater then __________ are unstable:

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80

79

82

83

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

Binding energy for deuteron nucleus is given by

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2.8 MeV

2.23 MeV

2.28 MeV

2.25 MeV

Which of the following are not hadrons.

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Muons

Mesons

Positrons

Neutrons

Rutherford performed on experiment on a nuclear reaction in:

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1921

1981

1927

1932

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