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

Charge on proton is

Question # 3

Three quarks make:

Question # 4

Which of these is not a radiation detector

Question # 5

The chemical properties of an element depends upon the number of

Question # 6

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 7

The figure 1.007276μ shows the mass of an:

Question # 8

Mass of neutron is

Question # 9

Neutron was disvovered by:

Question # 10

Gamma rays consist of steam of

Question # 11

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

Question # 12

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 13

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

Question # 14

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

Question # 15

The total charge of any nucleus is given as

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is
A. A - Z
B. A
C. Z
D. A + Z
2 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
3 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
4 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
5 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
6 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
7 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
8 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
9 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
10 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life

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