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

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Question # 1

Radioactivity is

Question # 2

Which of the following material has longer half life

Question # 3

In radio-active decay, the original element which disintegrate to another element is called

Question # 4

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

Question # 5

Three quarks make:

Question # 6

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

Question # 7

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

Question # 8

Pair production take place when energy ofγ-rays photon is

Question # 9

In 1932 Chadwick discovered

Question # 10

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

Question # 11

Alfa particles are

Question # 12

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

Question # 13

The half life of uranium-238 is

Question # 14

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

Question # 15

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

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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 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
3 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
4 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
5 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
6 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
7 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
8 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
9 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
10 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year

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