ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

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

The number of all the protons and neutrons in a nucleus is known as

Question # 2

γ-rays are

Question # 3

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

Question # 4

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

Question # 5

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

Question # 6

Mass of proton is

Question # 7

Binding energy per nucleus is

Question # 8

The isotope/s of hydrogen is /are:

Question # 9

Heavy water is made of one oxygen atom and two atoms of:

Question # 10

Neutron was disvovered by:

Question # 11

The half lie of radium-226 is

Question # 12

Which of the following material has longer half life

Question # 13

1 amu is equal to

Question # 14

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

Question # 15

A curie represents a very strong source of

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 There is present in paraffin a large amount of:
A. Nitrogen
B. Hydrogen
C. Carbon
D. Baryllium
2 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
3 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
4 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
5 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
6 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
7 Alfa particles are
A. hydrogen nuclei
B. helium nuclei
C. electrons
D. photons
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 U-238 present in the natural uranium is about:
A. 59%
B. 0.007%
C. 99%
D. 39%
10 According to Rutherford atomic model, the positive charge in an atom
A. is concentrated at its centre
B. is in the form of positive electron at same distance from its centre
C. is spread uniformly through its volume
D. none of these

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