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

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

Question # 2

The nucleus left after the emission of some radiation is called:

Question # 3

In radio-active decay, the original element which disintegrate to another element is called

Question # 4

Which are not the elementary particles?

Question # 5

The reciprocal of decay constant λ of a radioactive material is:

Question # 6

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

Question # 7

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

Question # 8

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 9

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

Question # 10

Charge on proton is

Question # 11

There is present in paraffin a large amount of:

Question # 12

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

Question # 13

The time required for a radioactive material to decrease in active by one half is called

Question # 14

The energy is found from Einstein's mass energy relation is called

Question # 15

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 16

Radioactivity was discovered by:

Question # 17

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

Question # 18

The isotope/s of hydrogen is /are:

Question # 19

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

Question # 20

Which of these is not a radiation detector

Question # 21

Electrons are

Question # 22

A mass spectrograph sort out

Question # 23

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

Question # 24

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

Question # 25

Neutrons are

Question # 26

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 27

Different radioactive material have

Question # 28

β-particles are easily deflected by collisions than heavy

Question # 29

γ-rays behave like a particle because they explain the

Question # 30

Neutron was discovered by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
2 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
3 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
4 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
5 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
6 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
7 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
8 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
9 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
10 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life

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