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

γ-rays are

Question # 2

Nucleon means:

Question # 3

In wilson cloud chamber, the air becomes saturated with:

Question # 4

Pair production take place when energy ofγ-rays photon is

Question # 5

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 6

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 7

Heavy water is made of one oxygen atom and two atoms of:

Question # 8

Nuclei that have the same charge number but different mass number are called

Question # 9

Neutron was discovered by

Question # 10

Curie is a unit of

Question # 11

When certain nucleus emits anα particle, its mass number:

Question # 12

Which of the following material has longer half life

Question # 13

Electrons are

Question # 14

Radioactivity was discovered by

Question # 15

The chemical behaviour of an atom is determined by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
2 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
3 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
4 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
5 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
6 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
7 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
8 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
9 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
10 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932

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