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

Question # 2

The rate of decay of a radioactive substance

Question # 3

The total charge of any nucleus is given as

Question # 4

The half life of radioactive substances depends upon

Question # 5

A pair of quark and antiquark makes a:

Question # 6

Marie curie and Pierre curie discovered:

Question # 7

Fraction of the decaying atoms per unit time is called

Question # 8

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 9

Rate of decay is actually described by.

Question # 10

The penetration power ofβ-particle is

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

1 amu is equal to

Question # 15

When certain nucleus emits anα particle, its mass number:

Question # 16

The number of isotopes of hydrogen are

Question # 17

Which are not the elementary particles?

Question # 18

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

Question # 19

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

Question # 20

A particle having the mass of electron and charge of a proton is called a

Question # 21

β-particles are easily deflected by collisions than heavy

Question # 22

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

Question # 23

When certain nucleus emits aβ-particles, is mass number:

Question # 24

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 # 25

Different radioactive material have

Question # 26

Structure of the nucleus was explained by

Question # 27

The nucleus/nuclei of hydrogen is/are:

Question # 28

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

Question # 29

The range of particle depends upon the factor

Question # 30

The number of protons inside a nucleus is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
2 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
3 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
4 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
5 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
6 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
7 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
8 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
9 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
10 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

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