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

The figure 1.007276μ shows the mass of an:

Question # 2

Gamma rays consist of steam of

Question # 3

Radioactivity was discovered by

Question # 4

Which are not the elementary particles?

Question # 5

The number of protons inside a nucleus is called

Question # 6

Phenomenon of radioactivity is due to disintegration of

Question # 7

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 8

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 9

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 10

The number of isotopes of hydrogen are

Question # 11

Charge on neutron is

Question # 12

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

Question # 13

A curie represents a very strong source of

Question # 14

Which of the following material has longer half life

Question # 15

Nucleon means:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
3 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
4 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
5 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
6 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
7 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
8 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
9 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
10 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves

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