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

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 2

Which of the following material has smaller has life

Question # 3

The range of particle depends upon the factor

Question # 4

γ-rays are

Question # 5

Fraction of the decaying atoms per unit time is called

Question # 6

Radioactivity

Question # 7

The isotope/s of hydrogen is /are:

Question # 8

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

Question # 9

Radioactivity is

Question # 10

Pair production take place when energy ofγ-rays photon is

Question # 11

Which of these is not a radiation detector

Question # 12

In wilson cloud chamber, the air becomes saturated with:

Question # 13

Gamma rays consist of steam of

Question # 14

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

Question # 15

The rate of decay of a radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
2 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
3 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
4 In radio-active decay, the original element which disintegrate to another element is called
A. element
B. daughter element
C. parent element
D. none of these
5 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
6 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
7 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
8 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
9 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
10 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52

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