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

Electrons are

Question # 2

Neutron was disvovered by:

Question # 3

Charge on proton is

Question # 4

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

Question # 5

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 6

Neutrons are

Question # 7

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

Question # 8

Beta particles are

Question # 9

Nucleus of a hydrogen atom may contain:

Question # 10

The half lie of radium-226 is

Question # 11

Nucleon means:

Question # 12

Radiation detector are used to

Question # 13

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

Question # 14

The rate of decay of radioactive substance

Question # 15

The number of protons inside a nucleus is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Nucleus of a hydrogen atom may contain:
A. One neutron only
B. Two protons and one neutron
C. Two protons and two neutrons
D. Aany of above
2 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
3 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
4 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
5 Radioactivity was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. All of them
6 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
7 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
8 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
9 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
10 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e

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