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

The energy is found from Einstein's mass energy relation is called

Question # 2

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

Question # 3

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 4

In 1932 Chadwick discovered

Question # 5

The unit of decay constant is:

Question # 6

Charge on proton is

Question # 7

In his experiment on nuclear reactions, Rutherford bombardedα particles on:

Question # 8

The half life of uranium-238 is

Question # 9

After alpha decay the atomic number of the atom

Question # 10

Different radioactive material have

Question # 11

The chemical properties of an element depends upon the number of

Question # 12

An alpha particle has a charge of

Question # 13

Gamma rays consist of steam of

Question # 14

A mass spectrograph sort out

Question # 15

Alfa particles are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
2 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
3 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
4 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
5 Maric Curie and Pieree Curie discovered two new radioactive elements, which are called
A. polonium uranium
B. uranium and radium
C. polonium and radium
D. none of these
6 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
7 Which of the following material has smaller has life
A. uranium
B. polonium
C. radium
D. radian
8 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
9 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
10 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford

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