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

Beta particles are

Question # 2

Rutherford performed an experiment on nuclear reactions in:

Question # 3

Radiation detector are used to

Question # 4

Structure of the nucleus was explained by

Question # 5

Curie is a unit of

Question # 6

The energy acquired by a mass of 1g moving with the speed of light is

Question # 7

The reciprocal of decay constant λ of a radioactive material is:

Question # 8

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

Question # 9

A curie represents a very strong source of

Question # 10

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

Question # 11

The emission of radiations take place in elements, having charge number greater than

Question # 12

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

Question # 13

The rate of decay of radioactive substance

Question # 14

Nucleus of a hydrogen atom may contain:

Question # 15

The half life of radioactive substances depends upon

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
2 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
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
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
4 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
5 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
6 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
7 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
8 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
9 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
10 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four

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