ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

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Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

00:00
Question # 1

Marie curie and Pierre curie discovered:

Question # 2

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

Question # 3

Mass of neutron is

Question # 4

Radium was discovered by:

Question # 5

The figure 1.007276μ shows the mass of an:

Question # 6

Neutron was discovered in

Question # 7

The unit of decay constant is

Question # 8

Neutrons are

Question # 9

The energy acquired by a mass of 1g moving with the speed of light is

Question # 10

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

Question # 11

In wilson cloud chamber, the air becomes saturated with:

Question # 12

γ-rays are

Question # 13

1 amu is equal to

Question # 14

The rate of decay of radioactive substance

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The nucleus left after the emission of some radiation is called:
A. Parent nucleus
B. Daughter necleus
C. Mother necleus
D. Any of these
2 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
3 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
4 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
5 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
6 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
7 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these
8 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
9 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these
10 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford

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