ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

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Question # 1

Rutherford performed an experiment on nuclear reactions in:

Question # 2

The energy is found from Einstein's mass energy relation is called

Question # 3

Neutron was suggested to be in the nucleus by:

Question # 4

The half life of uranium-238 is

Question # 5

The rate of decay of a radioactive substance

Question # 6

The unit of decay constant is

Question # 7

The diameter of an atom is of the order

Question # 8

The number of isotopes of hydrogen are

Question # 9

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 10

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 11

When certain nucleus emits aβ-particles, is mass number:

Question # 12

Radiation detector are used to

Question # 13

Mass of proton is

Question # 14

In wilson cloud chamber, the air becomes saturated with:

Question # 15

Neutrons are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
2 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
3 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
4 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
5 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
6 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
7 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
8 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
9 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
10 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these

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