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

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 2

Radioactivity was discovered by

Question # 3

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

Question # 4

The energy acquired by a mass of 1g moving with the speed of light is

Question # 5

Radiation detector are used to

Question # 6

The rate of decay of a radioactive substance

Question # 7

Alfa , beta and gamma rays are emitted from a radio-active substance

Question # 8

A mass spectrograph sort out

Question # 9

The penetration power ofβ-particle is

Question # 10

Different radioactive material have

Question # 11

Binding energy per nucleus is

Question # 12

The chemical properties of an element depends upon the number of

Question # 13

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

Question # 14

Which of these is not a radiation detector

Question # 15

β-particles are easily deflected by collisions than heavy

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
2 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
3 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
4 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
5 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
6 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
7 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
8 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
9 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
10 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford

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