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 number of neutrons in the nucleous is

Question # 2

Radioactivity was discovered by:

Question # 3

A particle having the mass of electron and charge of a proton is called a

Question # 4

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 5

A pair of quark and antiquark makes a:

Question # 6

Neutron was disvovered by:

Question # 7

The number of protons inside a nucleus is called

Question # 8

Which of the following material has longer half life

Question # 9

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 10

Neutron was suggested to be in the nucleus by:

Question # 11

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

Question # 12

How much time, theα-particle more massive than an electron

Question # 13

The unit of decay constant is

Question # 14

Nucleus of a hydrogen atom may contain:

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
2 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
3 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
4 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
5 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
6 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
7 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
8 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
9 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52
10 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life

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