ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

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

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

Question # 2

The penetration power ofβ-particle is

Question # 3

A curie represents a very strong source of

Question # 4

Pair production take place when energy ofγ-rays photon is

Question # 5

According to Rutherford atomic model, the positive charge in an atom

Question # 6

Marie curie and Pierre curie discovered:

Question # 7

The total charge of any nucleus is given as

Question # 8

Electrons are

Question # 9

Nucleus of a hydrogen atom may contain:

Question # 10

Rutherford performed an experiment on nuclear reactions in:

Question # 11

γ-rays are

Question # 12

Rate of decay is actually described by.

Question # 13

The most abundant isotope of neon is

Question # 14

The half lie of radium-226 is

Question # 15

For Protium, the mass defect is:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
2 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
3 In 1932 Chadwick discovered
A. proton
B. neutron
C. photon
D. electron
4 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
5 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
6 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
7 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927
8 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
9 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
10 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen

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