ECAT Pre General Science Physics Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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ECAT Pre General Science Physics Chapter 21 Nuclear Physics

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Question # 1

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 2

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

Question # 3

For Protium, the mass defect is:

Question # 4

Three quarks make:

Question # 5

The rate of decay of a radioactive substance

Question # 6

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

Question # 7

The range of particle depends upon the factor

Question # 8

Which of the following material has smaller has life

Question # 9

Rate of decay is actually described by.

Question # 10

The counter, which also provides the power to the G.M. tube is called:

Question # 11

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

Question # 12

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 13

The most abundant isotope of neon is

Question # 14

Nucleus consists of

Question # 15

Pair production take place when energy ofγ-rays photon is

Question # 16

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 # 17

1 amu is equal to

Question # 18

γ-rays behave like a particle because they explain the

Question # 19

In 1932 Chadwick discovered

Question # 20

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 21

Radioactivity was discovered by:

Question # 22

Different radioactive material have

Question # 23

When a charged particle passes through matter, it produces ionization, this effect is used in

Question # 24

Mass of proton is

Question # 25

Alfa particles are

Question # 26

Neutron was discovered in

Question # 27

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

Question # 28

After alpha decay the atomic number of the atom

Question # 29

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

Question # 30

Alfa , beta and gamma rays are emitted from a radio-active substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
2 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
3 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
4 Beta particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
5 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
6 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements
7 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
8 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
9 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
10 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev

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