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

00:00
Question # 1

Neutron was disvovered by:

Question # 2

An alpha particle has a charge of

Question # 3

Structure of the nucleus was explained by

Question # 4

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 5

Alfa particles are

Question # 6

Which are not the elementary particles?

Question # 7

1 amu is equal to

Question # 8

The number of protons inside a nucleus is called

Question # 9

The figure 1.007276μ shows the mass of an:

Question # 10

The number if neutrons in the nucleus of 92U235are

Question # 11

The unit of decay constant is

Question # 12

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

Question # 13

Different radioactive material have

Question # 14

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 # 15

Beta particles are

Question # 16

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 # 17

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

Question # 18

Nucleus of a hydrogen atom may contain:

Question # 19

γ-rays behave like a particle because they explain the

Question # 20

Phenomenon of radioactivity is due to disintegration of

Question # 21

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 22

The penetration power ofβ-particle is

Question # 23

The chemical properties of all the isotopes of an elements are

Question # 24

Which of the following material has longer half life

Question # 25

Curie is a unit of

Question # 26

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 27

Radiation detector are used to

Question # 28

A mass spectrograph sort out

Question # 29

Radium was discovered by:

Question # 30

The rate of decay of radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
2 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
3 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
4 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
5 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
6 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
7 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
8 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
9 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
10 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these

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