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

1 amu is equal to

Question # 2

Phenomenon of radioactivity is due to disintegration of

Question # 3

Pair production take place when energy ofγ-rays photon is

Question # 4

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

Question # 5

The chemical properties of an element depends upon the number of

Question # 6

The diameter of an atom is of the order

Question # 7

Beta particles are

Question # 8

The penetration power ofβ-particle is

Question # 9

γ-rays are

Question # 10

The nuclei of an element having the same charge number but different mass numbers are called:

Question # 11

The unit of decay constant is:

Question # 12

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

Question # 13

The number of protons inside a nucleus is called

Question # 14

Radioactivity is

Question # 15

The half life of uranium-238 is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
2 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
3 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
4 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
5 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
6 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
7 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
8 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
9 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
10 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.

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