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

Which of these is not a radiation detector

Question # 2

Nucleus consists of

Question # 3

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 4

The emission of radiations take place in elements, having charge number greater than

Question # 5

In wilson cloud chamber, the air becomes saturated with:

Question # 6

Examples of moderators used in a fission reactor is/are:

Question # 7

Radiation detector are used to

Question # 8

A curie represents a very strong source of

Question # 9

A mass spectrograph sort out

Question # 10

In radio-active decay, the original element which disintegrate to another element is called

Question # 11

1 amu is equal to

Question # 12

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 13

Rutherford performed an experiment on nuclear reactions in:

Question # 14

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 15

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
2 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
3 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
4 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
5 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
6 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
7 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
8 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
9 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
10 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1

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