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

Rutherford performed an experiment on nuclear reactions in:

Question # 2

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

Question # 3

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

Question # 4

The number if neutrons in the nucleus of 92U235are

Question # 5

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

Question # 6

Rate of decay is actually described by.

Question # 7

γ-rays behave like a particle because they explain the

Question # 8

The number of isotopes of hydrogen are

Question # 9

Charge on neutron is

Question # 10

Charge on proton is

Question # 11

Which of the following material has smaller has life

Question # 12

Neutron was discovered in

Question # 13

Radiation detector are used to

Question # 14

An alpha particle has a charge of

Question # 15

The half life of radioactive substances depends upon

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 1 amu is equal to.
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-24kg
D. 1.66 x 10-27kg
2 The half life of uranium-238 is
A. 6.2 x 109years
B. 4.5 x 109days
C. 4.5 x 109years
D. 1.3 x 106years
3 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
A. nuclear fission
B. nuclear fusion
C. man defect
D. radioactivity
4 Charge on proton is
A. 1.59 x 10-9C
B. 1.59 x 10-7C
C. -1.59 x 10-19 C
D. 1.59 x 10-19C
5 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
6 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
7 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars
8 In radioactive decay, the new element which is formed due to the disintegration of original element is called
A. element
B. daughter element
C. parent element
D. none of these
9 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
10 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these

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