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 nuclei of an element having the same charge number but different mass numbers are called:

Question # 2

In 1932 Chadwick discovered

Question # 3

For Protium, the mass defect is:

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 8

Binding energy per nucleus is

Question # 9

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

Question # 10

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

Question # 11

Neutrons are

Question # 12

Heavy water is made of one oxygen atom and two atoms of:

Question # 13

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

Question # 14

A curie represents a very strong source of

Question # 15

The rate of decay of radioactive substance

Question # 16

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

Question # 17

Marie curie and Pierre curie discovered:

Question # 18

Which of the following material has smaller has life

Question # 19

A mass spectrograph sort out

Question # 20

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

Question # 21

Neutron was disvovered by:

Question # 22

Alfa particles are

Question # 23

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

Question # 24

β-particles are easily deflected by collisions than heavy

Question # 25

The unit of decay constant is

Question # 26

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

Question # 27

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 # 28

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

Question # 29

1 amu is equal to.

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 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
2 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
3 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
4 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
5 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
6 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
7 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
8 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
9 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
10 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks

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