ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Question # 1

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 2

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 3

Radioactivity was discovered by:

Question # 4

Mass of proton is

Question # 5

The half life of radioactive substances depends upon

Question # 6

A pair of quark and antiquark makes a:

Question # 7

Electrons are

Question # 8

The unit of decay constant is:

Question # 9

The unit of decay constant is

Question # 10

The chemical behaviour of an atom is determined by

Question # 11

Pair production take place when energy ofγ-rays photon is

Question # 12

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

Question # 13

Alfa particles are

Question # 14

The penetration power ofβ-particle is

Question # 15

An alpha particle has a charge of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
2 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
3 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
4 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
5 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
6 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
7 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
8 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
9 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
10 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920

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