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 half life of radioactive substances depends upon

Question # 2

Neon gas have three isotopes whose atomic numbers are

Question # 3

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

Question # 4

The isotope/s of hydrogen is /are:

Question # 5

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 6

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

Question # 7

Which are not the elementary particles?

Question # 8

There is present in paraffin a large amount of:

Question # 9

Radioactivity was discovered by

Question # 10

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

Question # 11

Pair production take place when energy ofγ-rays photon is

Question # 12

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

Question # 13

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

Question # 14

The rate of decay of radioactive substance

Question # 15

Neutron was discovered by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Electrons are
A. positive charged
B. negatively charged
C. massless
D. neutral
2 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
3 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
4 When certain nucleus emits aβ-particles, is mass number:
A. Remain same
B. Increases by one
C. Decreases by one
D. Decreases by four
5 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
6 In his experiment on nuclear reactions, Rutherford bombardedα particles on:
A. Nitrogen
B. Hydrogen
C. Lead
D. Oxygen
7 Referring to the above figure, we can say that of all the elements, the most stable element is
A. Phosphours
B. Iron
C. uranium
D. Lithium
8 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
9 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
10 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

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