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

The number of protons inside a nucleus is called

Question # 2

Which of the following material has smaller has life

Question # 3

Examples of moderators used in a fission reactor is/are:

Question # 4

Neutron was discovered in

Question # 5

Charge on proton is

Question # 6

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

Question # 7

γ-rays behave like a particle because they explain the

Question # 8

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

Question # 9

Curie is a unit of

Question # 10

Which are not the elementary particles?

Question # 11

The unit of decay constant is:

Question # 12

The chemical properties of an element depends upon the number of

Question # 13

Radiation detector are used to

Question # 14

γ-rays are

Question # 15

The half lie of radium-226 is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
2 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
3 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
4 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
5 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
6 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
7 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
8 Different radioactive material have
A. same half lives
B. different half lives
C. same mean lives
D. same total lives
9 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
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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