ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

00:00
Question # 1

Pair production take place when energy ofγ-rays photon is

Question # 2

The half life of radioactive substances depends upon

Question # 3

The half lie of radium-226 is

Question # 4

Which of the following material has longer half life

Question # 5

There is present in paraffin a large amount of:

Question # 6

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

Question # 7

Curie is a unit of

Question # 8

Mass of proton is

Question # 9

The range of particle depends upon the factor

Question # 10

Neutron was disvovered by:

Question # 11

The chemical properties of all the isotopes of an elements are

Question # 12

Gamma rays consist of steam of

Question # 13

Marie curie and Pierre curie discovered:

Question # 14

Charge on proton is

Question # 15

A pair of quark and antiquark makes a:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
2 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
3 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
4 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
5 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
6 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
7 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
8 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
9 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
10 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector

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