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 time required for a radioactive material to decrease in active by one half is called

Question # 2

The distance travelled byα-particle in a medium before coming to rest, is called

Question # 3

The diameter of an atom is of the order

Question # 4

The number of protons inside a nucleus is called

Question # 5

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

Question # 6

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

Question # 7

The range ofβ-particle in air is greater than that ofα-particle by

Question # 8

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 9

Which of the following material has longer half life

Question # 10

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

Question # 11

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

Question # 12

Alfa particles are

Question # 13

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

Question # 14

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

Question # 15

After alpha decay the atomic number of the atom

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
2 Gamma rays consist of steam of
A. electron
B. proton
C. photons
D. all of these
3 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
4 The most abundant isotope of neon is
A. neon-20
B. neon-21
C. neon-22
D. neon-23
5 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
6 How many isotopes of helium are present?
A. 1
B. 2
C. 3
D. 4
7 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
8 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
9 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
10 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

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