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

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Question # 1

Mass of proton is

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

The unit of decay constant is:

Question # 4

Radioactivity was discovered by:

Question # 5

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

Question # 6

The rate of decay of a radioactive substance

Question # 7

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

Question # 8

Neutron was discovered by

Question # 9

Neutrons are

Question # 10

The number if neutrons in the nucleus of 92U235are

Question # 11

The most abundant isotope of neon is

Question # 12

Binding energy per nucleus is

Question # 13

A curie represents a very strong source of

Question # 14

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 15

The number of isotopes of hydrogen are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
3 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
4 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
5 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
6 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
7 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
8 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
9 Rutherford performed an experiment on nuclear reactions in:
A. 1718 A.D
B. 1818 A.D
C. 1918 A.D
D. 2001 A.D.
10 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four

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