ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

Try The 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

After alpha decay the atomic number of the atom

Question # 2

Examples of moderators used in a fission reactor is/are:

Question # 3

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

Question # 4

β-particles are easily deflected by collisions than heavy

Question # 5

The mass of the nucleus is always less than the total man of the protons and neutron that make up the nucleus. The difference of the two masses is called

Question # 6

During the nuclear changes, the law/s of conservation that hold/s are that of:

Question # 7

The number of isotopes of hydrogen are

Question # 8

The rate of decay of radioactive substance

Question # 9

1 amu is equal to.

Question # 10

How many isotopes of helium are present?

Question # 11

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

Question # 12

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

Question # 13

Phenomenon of radioactivity is due to disintegration of

Question # 14

A mass spectrograph sort out

Question # 15

The chemical properties of all the isotopes of an elements are

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
2 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
3 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
4 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
5 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
6 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
7 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
8 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
9 β-particles are easily deflected by collisions than heavy
A. α-particles
B. β-particles
C. γ-particles
D. none of these
10 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

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