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

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

Question # 2

Charge on proton is

Question # 3

β-particles are easily deflected by collisions than heavy

Question # 4

Which are not the elementary particles?

Question # 5

Fraction of the decaying atoms per unit time is called

Question # 6

The range of particle depends upon the factor

Question # 7

When a nucleus emits an alpha particles, its charge number decreases by

Question # 8

Mass of proton is

Question # 9

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

Question # 10

The diameter of an atom is of the order

Question # 11

The number of all the protons and neutrons in a nucleus is known as

Question # 12

Structure of the nucleus was explained by

Question # 13

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 14

Nuclei that have the same charge number but different mass number are called

Question # 15

Neutrons are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
2 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
3 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
4 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
5 The missing mass which is converted to energy in the formation of nucleus, is called
A. packing fraction
B. mass defect
C. binding energy
D. none of these
6 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
7 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
8 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
9 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
10 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time

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