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

Curie is a unit of

Question # 2

Radioactivity

Question # 3

The reciprocal of decay constant λ of a radioactive material is:

Question # 4

β-particles are easily deflected by collisions than heavy

Question # 5

1 amu is equal to

Question # 6

Pair production take place when energy ofγ-rays photon is

Question # 7

Different radioactive material have

Question # 8

Mass of neutron is

Question # 9

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

Question # 10

Structure of the nucleus was explained by

Question # 11

The number if neutrons in the nucleus of 92U235are

Question # 12

Mass of proton is of order of

Question # 13

Phenomenon of radioactivity is due to disintegration of

Question # 14

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

Question # 15

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
2 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
3 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
4 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
5 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
6 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
7 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
8 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
9 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
10 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932

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