Question # 1

The most useful tracer is.

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Strontium -90

Iodine -31

Cobalt -60

Carbon -14

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

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Baryons

Leptons

Mesons

Quarks

The building blocks of protons and neutrons are called.

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Ions

Electrons

Positrons

quarks

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

When a nucleus emits alpha particle its atomic mass decreases by

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1

2

3

4

For workers in nuclear facilities is, a weekly does of is normally considered safe

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1.0 msv

5.0 msv

2.0 msv

3.0 msv

The number of Isotopes of cesium are.

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4

32

22

36

The most abundant isotope of neon is:

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Neon 21

Neon 20

Neon 22

None of above

The binding energy per nucleon is maximum for

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Helium

Iron

Potassium

Radium

Half life of Uranium -239 is

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26.5 minutes

24.5 minutes

25.5 minutes

23.5 minutes

Which of the following are not hadrons.

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Muons

Mesons

Positrons

Neutrons

Binding energy for deuteron nucleus is given by

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2.8 MeV

2.23 MeV

2.28 MeV

2.25 MeV

In nuclear radiation , track of alpha particle is.

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Thin

Discontinuous

Erratic

Continuous

Unit of decay constantλ is:

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ms

m^-1

m

S^-1

The number of neutrons in Li are

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2

3

4

7

Bottom quark carries charge :

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2/3 e

-2/3 e

+1/3 e

-1 /3 e

The mass of proton in amu is:

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1.07276

1.7276

1.007276

1.0007276

Cosmic rays consist of

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Protons

High energy photons

Positron

All of above

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