ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

Try The 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

γ-rays behave like a particle because they explain the

Question # 2

How many isotopes of helium are present?

Question # 3

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

Question # 4

The rate of decay of a radioactive substance

Question # 5

Alfa particles are

Question # 6

Beta particles are

Question # 7

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 8

Mass of neutron is

Question # 9

A curie represents a very strong source of

Question # 10

Phenomenon of radioactivity is due to disintegration of

Question # 11

The number of isotopes of hydrogen are

Question # 12

Binding energy per nucleus is

Question # 13

When certain nucleus emits aβ-particles, is mass number:

Question # 14

Mass of proton is of order of

Question # 15

Pair production take place when energy ofγ-rays photon is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Radioactivity was discovered by
A. Rutherford
B. Henri Becqureal
C. Maxwell
D. James Chadwick
3 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
4 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
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 The rate of decay of radioactive substance
A. is constant
B. decrease exponentially with time
C. varies inversely as time
D. decreases linearly with time
7 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
8 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
9 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
10 Radioactivity
A. is exhibited more by semiconductors in general
B. in exhibited more by the element when they are coupled
C. with other radioactive elements by a covalent bond
D. is an atomic property of radioactive elements

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  • alishba rasheed

    alishba rasheed

    03 Mar 2018

    easy mcqs

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