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

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 # 2

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

Question # 3

Structure of the nucleus was explained by

Question # 4

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

Question # 5

Nucleus of a hydrogen atom may contain:

Question # 6

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

Question # 7

Neutrons are

Question # 8

The penetration power ofβ-particle is

Question # 9

Binding energy per nucleus is

Question # 10

Neutron was discovered by

Question # 11

Which are not the elementary particles?

Question # 12

The total charge of any nucleus is given as

Question # 13

The rate of decay of radioactive substance

Question # 14

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

Question # 15

Mass of proton is of order of

Question # 16

Which of the following material has smaller has life

Question # 17

The number of isotopes of hydrogen are

Question # 18

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

Question # 19

After alpha decay the atomic number of the atom

Question # 20

The rate of decay of a radioactive substance

Question # 21

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

Question # 22

Proton was discovered by Rutherford in

Question # 23

A curie represents a very strong source of

Question # 24

Neutron was disvovered by:

Question # 25

Pair production take place when energy ofγ-rays photon is

Question # 26

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

Question # 27

γ-rays are

Question # 28

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

Question # 29

The amount of energy equivalent to 1 a.m.u is

Question # 30

There is present in paraffin a large amount of:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
2 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
3 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
4 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
5 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
6 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
7 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
8 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
9 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
10 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford

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