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

When a nucleus emits an alpha particle, it atomic mass decreased by

Question # 2

Electrons are

Question # 3

An alpha particle has a charge of

Question # 4

According to Rutherford atomic model, the positive charge in an atom

Question # 5

Rate of decay is actually described by.

Question # 6

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

Question # 7

Nucleon means:

Question # 8

Which of these is not a radiation detector

Question # 9

Pair production take place when energy ofγ-rays photon is

Question # 10

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

Question # 11

Neutron was disvovered by:

Question # 12

The unit of decay constant is:

Question # 13

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

Question # 14

U-238 present in the natural uranium is about:

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 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
2 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
3 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
4 The unit of decay constant is
A. sex
B. sec2
C. sec-1
D. sec-2
5 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
6 Neutron was discovered in
A. 1915
B. 1920
C. 1925
D. 1932
7 Mass of proton is of order of
A. 10-31gm
B. 10-27kg
C. 10-24gm
D. 10+27kg
8 The number of all the protons and neutrons in a nucleus is known as
A. atomic number
B. mass number
C. charge number
D. none of these
9 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
10 The nucleus/nuclei of hydrogen is/are:
A. Proton
B. Deuteron
C. Triton
D. All of these

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