ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

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

Question # 2

Beta particles are

Question # 3

Marie curie and Pierre curie discovered:

Question # 4

The half life of radioactive substances depends upon

Question # 5

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

Question # 6

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 7

For Protium, the mass defect is:

Question # 8

Neutron was suggested to be in the nucleus by:

Question # 9

The range ofβ-particle in air is greater than that ofα-particle by

Question # 10

The number of isotopes of hydrogen are

Question # 11

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 12

The number of protons inside a nucleus is called

Question # 13

Which of the following material has longer half life

Question # 14

Phenomenon of radioactivity is due to disintegration of

Question # 15

The nucleus/nuclei of hydrogen is/are:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
3 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
4 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
5 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
8 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
9 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
10 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)

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