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

Alfa particles are

Question # 2

Mass of proton is

Question # 3

The nucleus/nuclei of hydrogen is/are:

Question # 4

γ-rays are

Question # 5

The chemical behaviour of an atom is determined by

Question # 6

Pair production take place when energy ofγ-rays photon is

Question # 7

The figure 1.007276μ shows the mass of an:

Question # 8

1 amu is equal to.

Question # 9

γ-rays behave like a particle because they explain the

Question # 10

Neon gas have three isotopes whose atomic numbers are

Question # 11

The isotope/s of hydrogen is /are:

Question # 12

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 13

Neutron was disvovered by:

Question # 14

Marie curie and Pierre curie discovered:

Question # 15

The unit of decay constant is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
2 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
3 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
4 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
5 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
6 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
7 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
8 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
9 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
10 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

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