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

Mass of neutron is

Question # 2

Marie curie and Pierre curie discovered:

Question # 3

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 4

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

Question # 5

An alpha particle has a charge of

Question # 6

Neutron was suggested to be in the nucleus by:

Question # 7

Fraction of the decaying atoms per unit time is called

Question # 8

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 9

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 10

The rate of decay of radioactive substance

Question # 11

The rate of decay of a radioactive substance

Question # 12

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

Question # 13

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 14

A mass spectrograph sort out

Question # 15

Structure of the nucleus was explained by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
2 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
3 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
4 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
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 The half life of radioactive substances depends upon
A. amount of substance
B. energy of substance
C. state of substance
D. temperature of substance
7 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
8 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
9 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
10 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze

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