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

The energy acquired by a mass of 1g moving with the speed of light is

Question # 2

The chemical properties of an element depends upon the number of

Question # 3

After alpha decay the atomic number of the atom

Question # 4

According to Rutherford atomic model, the positive charge in an atom

Question # 5

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 6

The unit of decay constant is

Question # 7

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

Question # 8

γ-rays are

Question # 9

The number of protons inside a nucleus is called

Question # 10

In wilson cloud chamber, the air becomes saturated with:

Question # 11

The number if neutrons in the nucleus of 92U235are

Question # 12

Different radioactive material have

Question # 13

When a nucleus emits an alpha particles, its charge number decreases by

Question # 14

The half lie of radium-226 is

Question # 15

The emission of radiations take place in elements, having charge number greater than

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
2 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
3 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
4 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
5 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
6 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
7 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
8 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
9 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
10 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium

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