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

The number of protons inside a nucleus is called

Question # 2

How much time, theα-particle more massive than an electron

Question # 3

Neon gas have three isotopes whose atomic numbers are

Question # 4

U-238 present in the natural uranium is about:

Question # 5

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

Question # 6

The range of particle depends upon the factor

Question # 7

In radio-active decay, the original element which disintegrate to another element is called

Question # 8

The diameter of an atom is of the order

Question # 9

Which of the following material has smaller has life

Question # 10

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

Question # 11

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

Question # 12

For an atom having atomic number Z and atomic weight A, the charge on the nucleus is

Question # 13

Which of the following material has longer half life

Question # 14

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

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 Neutron was discovered by
A. Curie
B. Roentgen
C. Chadwick
D. Rutherford
2 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
3 When certain nucleus emits anα particle, its mass number:
A. Increases by one
B. Decreases by one
C. Remain same
D. Decreases by four
4 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
5 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
6 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
7 When a charged particle passes through matter, it produces ionization, this effect is used in
A. fission reaction
B. reactor
C. radiation detector
D. fusion reaction
8 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
9 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
10 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A

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