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

00:00
Question # 1

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

Question # 2

Radioactivity was discovered by:

Question # 3

The half life of uranium-238 is

Question # 4

An alpha particle has a charge of

Question # 5

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 6

Which are not the elementary particles?

Question # 7

The penetration power ofβ-particle is

Question # 8

1 amu is equal to.

Question # 9

The diameter of an atom is of the order

Question # 10

Radioactivity is

Question # 11

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 12

U-238 present in the natural uranium is about:

Question # 13

Neutron was disvovered by:

Question # 14

Mass of proton is of order of

Question # 15

Mass of neutron is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
2 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
3 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
4 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
5 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
6 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
7 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
8 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
9 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
10 The emission of radiations take place in elements, having charge number greater than
A. 109
B. 82
C. 69
D. 52

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