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

Neutron was discovered by

Question # 3

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 4

Charge on neutron is

Question # 5

The half life of radioactive substances depends upon

Question # 6

A pair of quark and antiquark makes a:

Question # 7

Mass of proton is of order of

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

Radioactivity was discovered by:

Question # 12

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

Question # 13

Mass of proton is

Question # 14

The half lie of radium-226 is

Question # 15

How much time, theα-particle more massive than an electron

Question # 16

The range of particle depends upon the factor

Question # 17

In 1932 Chadwick discovered

Question # 18

γ-rays are

Question # 19

Rutherford performed an experiment on nuclear reactions in:

Question # 20

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

Question # 21

The isotope/s of hydrogen is /are:

Question # 22

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 23

Marie curie and Pierre curie discovered:

Question # 24

Phenomenon of radioactivity is due to disintegration of

Question # 25

Rate of decay is actually described by.

Question # 26

The number of protons inside a nucleus is called

Question # 27

Neutron was suggested to be in the nucleus by:

Question # 28

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

Question # 29

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

Question # 30

The figure 1.007276μ shows the mass of an:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
2 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
3 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
4 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
5 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
6 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
7 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
8 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
9 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
10 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle

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