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

A particle having the mass of electron and charge of a proton is called a

Question # 2

In 1932 Chadwick discovered

Question # 3

Rutherford performed an experiment on nuclear reactions in:

Question # 4

A mass difference of 0.0012 u is equivalent to and energy of:

Question # 5

Mass of neutron is

Question # 6

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 7

γ-rays behave like a particle because they explain the

Question # 8

The unit of decay constant is

Question # 9

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

Question # 10

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

Question # 11

The total charge of any nucleus is given as

Question # 12

Marie curie and Pierre curie discovered:

Question # 13

Heavy water is made of one oxygen atom and two atoms of:

Question # 14

Fraction of the decaying atoms per unit time is called

Question # 15

Which are not the elementary particles?

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 In wilson cloud chamber, the air becomes saturated with:
A. Alcohol vapours
B. Water
C. Helium gas
D. Nitrogen gas
2 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
3 Heavy water is made of one oxygen atom and two atoms of:
A. Protium
B. Deuterium
C. Tritium
D. Any of these
4 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons
5 The reciprocal of decay constant λ of a radioactive material is:
A. Frequency
B. Half life
C. Year
D. Mean life
6 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
7 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
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 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
10 Nuclei that have the same charge number but different mass number are called
A. isotones
B. isomers
C. isotopes
D. isobars

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