ECAT Pre Computer Science Chapter 21 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

Try The MCQ's Test For ECAT Physics Chapter 21 Nuclear Physics

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ECAT Physics Chapter 21 Nuclear Physics

00:00
Question # 1

The amount of energy equivalent to 1 a.m.u is

Question # 2

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

Question # 3

The diameter of an atom is of the order

Question # 4

The most abundant isotope of neon is

Question # 5

When certain nucleus emits aβ-particles, is mass number:

Question # 6

Which are not the elementary particles?

Question # 7

The unit of decay constant is:

Question # 8

Fraction of the decaying atoms per unit time is called

Question # 9

Beta particles are

Question # 10

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

Question # 11

Proton was discovered by Rutherford in

Question # 12

The number of isotopes of hydrogen are

Question # 13

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

Question # 14

Neutron was discovered in

Question # 15

The half life of uranium-238 is

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
2 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
3 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
4 Radium was discovered by:
A. Becquerel
B. Marie curie
C. Pierre curie
D. Rutherford
5 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
6 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
7 The isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
8 A pair of quark and antiquark makes a:
A. Meson
B. Baryon
C. Proton
D. Neutron
9 Binding energy per nucleus is
A. greater for heavy nucleus
B. least for heavy nucleus
C. greatest for light nuclei
D. decreases for medium weight niclei
10 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

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