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

Phenomenon of radioactivity is due to disintegration of

Question # 3

1 amu is equal to

Question # 4

Gamma rays consist of steam of

Question # 5

The amount of energy equivalent to 1 a.m.u is

Question # 6

γ-rays behave like a particle because they explain the

Question # 7

According to Rutherford atomic model, the positive charge in an atom

Question # 8

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

Question # 9

Which of the following material has longer half life

Question # 10

Rate of decay is actually described by.

Question # 11

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 12

A curie represents a very strong source of

Question # 13

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

Question # 14

A mass spectrograph sort out

Question # 15

Neutrons are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
2 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
3 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
4 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
5 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
6 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
7 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
8 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
9 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
10 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze

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