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

A particle having the mass of electron and charge of a proton is called a

Question # 2

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 3

Binding energy per nucleus is

Question # 4

In 1932 Chadwick discovered

Question # 5

The chemical behaviour of an atom is determined by

Question # 6

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 7

Radioactivity

Question # 8

Neutrons are

Question # 9

The range of particle depends upon the factor

Question # 10

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

Question # 11

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 12

The number of isotopes of hydrogen are

Question # 13

The missing mass which is converted to energy in the formation of nucleus, is called

Question # 14

Rutherford performed an experiment on nuclear reactions in:

Question # 15

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
2 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
3 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four
4 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
5 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
6 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
7 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
8 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
9 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
10 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927

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