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

Gamma rays consist of steam of

Question # 2

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

Question # 3

In radio-active decay, the original element which disintegrate to another element is called

Question # 4

There is present in paraffin a large amount of:

Question # 5

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

Question # 6

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

Question # 7

Marie curie and Pierre curie discovered:

Question # 8

Neutron was suggested to be in the nucleus by:

Question # 9

Referring to the above figure, we can say that of all the elements, the most stable element is

Question # 10

Nucleus of a hydrogen atom may contain:

Question # 11

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

Question # 12

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

Question # 13

Neutron was disvovered by:

Question # 14

Maric Curie and Pieree Curie discovered two new radioactive elements, which are called

Question # 15

How many isotopes of helium are present?

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
2 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
3 Three quarks make:
A. An electron
B. A meson
C. A baryon
D. A photon
4 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
5 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
6 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
7 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these
8 Mass of proton is
A. 1.67 x 10-27kg
B. 1.67 x 10-31kg
C. 1.66 x 10-34kg
D. 1.67 x 10-17kg
9 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle
10 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

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