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

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

Question # 2

The chemical properties of an element depends upon the number of

Question # 3

In 1932 Chadwick discovered

Question # 4

The half lie of radium-226 is

Question # 5

Which of the following material has smaller has life

Question # 6

Nuclei that have the same charge number but different mass number are called

Question # 7

For Protium, the mass defect is:

Question # 8

Radioactivity

Question # 9

For an atom having atomic number 'Z' and atomic weight 'A', the number of neutrons in the nucleous is

Question # 10

β-particles are easily deflected by collisions than heavy

Question # 11

The half life of uranium-238 is

Question # 12

Different radioactive material have

Question # 13

For an atom having atomic number Z and atomic weight A, the number of electron in an atoms

Question # 14

The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
2 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
3 A mass difference of 0.0012 u is equivalent to and energy of:
A. 0.5 Me V
B. 1.13 MeV
C. 5.13 MeV
D. 1.13 keV
4 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
5 When a nucleus emits an alpha particles, its charge number decreases by
A. 3
B. 2
C. 6
D. 5
6 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
7 The nucleous of uranium -235 differs from a nucleous of a uranium -238 in that the later contains
A. 3 more neutrons
B. 3 more electrons
C. 3 more protons
D. 3 more ions
8 When a nucleus emits an alpha particle, it atomic mass decreased by
A. 2
B. 1
C. 4
D. 3
9 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
10 Neutron was disvovered by:
A. Rutherford in 1920
B. Chadwick in 1922
C. Bohr in 1913
D. Compton in 1927

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