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

Neon gas have three isotopes whose atomic numbers are

Question # 2

Mass of neutron is

Question # 3

The penetration power ofβ-particle is

Question # 4

U-238 present in the natural uranium is about:

Question # 5

Neutron was discovered in

Question # 6

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

Question # 7

Alfa particles are

Question # 8

Neutron was disvovered by:

Question # 9

A curie represents a very strong source of

Question # 10

Nuclei that have the same charge number but different mass number are called

Question # 11

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

Question # 12

After alpha decay the atomic number of the atom

Question # 13

Electrons are

Question # 14

The rate of decay of radioactive substance

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
2 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
3 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
4 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
5 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
6 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
7 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
8 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
9 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
10 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2

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