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

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

Question # 2

After alpha decay the atomic number of the atom

Question # 3

Pair production take place when energy ofγ-rays photon is

Question # 4

Neutron was disvovered by:

Question # 5

The penetration power ofβ-particle is

Question # 6

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

Question # 7

Rutherford performed an experiment on nuclear reactions in:

Question # 8

Nucleus of a hydrogen atom may contain:

Question # 9

The half life of uranium-238 is

Question # 10

The rate of decay of a radioactive substance

Question # 11

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

Question # 12

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

Question # 13

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 14

A mass spectrograph sort out

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
2 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
3 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
4 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
5 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
6 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
7 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
8 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
9 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
10 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927

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