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 counter, which also provides the power to the G.M. tube is called:

Question # 2

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

Question # 3

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

Question # 4

U-238 present in the natural uranium is about:

Question # 5

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

Question # 6

An alpha particle has a charge of

Question # 7

β-particles are easily deflected by collisions than heavy

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

The total charge of any nucleus is given as

Question # 13

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

Question # 14

Which of the following material has longer half life

Question # 15

The emission of radiations take place in elements, having charge number greater than

Question # 16

Beta particles are

Question # 17

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

Question # 18

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

Question # 19

Marie curie and Pierre curie discovered:

Question # 20

Nucleon means:

Question # 21

Phenomenon of radioactivity is due to disintegration of

Question # 22

Which of the following material has smaller has life

Question # 23

Radioactivity

Question # 24

Neutron was suggested to be in the nucleus by:

Question # 25

Mass of neutron is

Question # 26

The unit of decay constant is:

Question # 27

There is present in paraffin a large amount of:

Question # 28

The number of protons inside a nucleus is called

Question # 29

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 30

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
2 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
3 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
4 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
5 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
6 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
7 Mass of neutron is
A. 1.67 x 10-31kg
B. 1.67 x 10-27kg
C. 9.1 x 10-31kg
D. 1.67 x 10-19kg
8 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
9 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
10 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

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