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

A curie represents a very strong source of

Question # 2

γ-rays are

Question # 3

1 amu is equal to

Question # 4

An alpha particle has a charge of

Question # 5

Mass of proton is of order of

Question # 6

How much time, theα-particle more massive than an electron

Question # 7

Neutron was discovered in

Question # 8

The amount of energy equivalent to 1 a.m.u is

Question # 9

Alfa particles are

Question # 10

Which of the following material has smaller has life

Question # 11

The rate of decay of radioactive substance

Question # 12

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

Question # 13

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

Question # 14

Neutron was suggested to be in the nucleus by:

Question # 15

In 1932 Chadwick discovered

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
2 Rate of decay is actually described by.
A. Half line
B. Decay constant
C. Mean life
D. Total life
3 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
4 Proton was discovered by Rutherford in
A. 1915
B. 1906
C. 1910
D. 1920
5 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
6 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
7 The range ofβ-particle in air is greater than that ofα-particle by
A. 1000 times
B. 100 times
C. 15 times
D. 10 times
8 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
9 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
10 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years

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