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

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

Question # 2

Neutrons are

Question # 3

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 # 4

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

Question # 5

Radium was discovered by:

Question # 6

Binding energy per nucleus is

Question # 7

Charge on proton is

Question # 8

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

Question # 9

The penetration power ofβ-particle is

Question # 10

Structure of the nucleus was explained by

Question # 11

Pair production take place when energy ofγ-rays photon is

Question # 12

Rutherford performed an experiment on nuclear reactions in:

Question # 13

Radiation detector are used to

Question # 14

In wilson cloud chamber, the air becomes saturated with:

Question # 15

The number of protons inside a nucleus is called

Question # 16

After alpha decay the atomic number of the atom

Question # 17

Which of the following material has longer half life

Question # 18

A pair of quark and antiquark makes a:

Question # 19

The half life of radioactive substances depends upon

Question # 20

The number of isotopes of hydrogen are

Question # 21

Three quarks make:

Question # 22

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

Question # 23

Nucleus of a hydrogen atom may contain:

Question # 24

For Protium, the mass defect is:

Question # 25

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

Question # 26

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

Question # 27

Radioactivity is

Question # 28

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

Question # 29

Radioactivity was discovered by:

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 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
2 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
3 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
4 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
5 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
6 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
7 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
8 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
9 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
10 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric

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