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

Radiation detector are used to

Question # 2

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

Question # 3

Rate of decay is actually described by.

Question # 4

When a nucleus emits an alpha particles, its charge number decreases by

Question # 5

The emission of radiations take place in elements, having charge number greater than

Question # 6

1 amu is equal to

Question # 7

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

Question # 8

Heavy water is made of one oxygen atom and two atoms of:

Question # 9

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 10

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

Question # 11

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 12

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

Question # 13

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 14

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

Question # 15

The penetration power ofβ-particle is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
2 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
3 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
4 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
5 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
6 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
7 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
8 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
9 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
10 Neon gas have three isotopes whose atomic numbers are
A. 20, 24 , 23
B. 20, 21 , 22
C. 20, 19 , 21
D. none of these

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