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

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

Question # 2

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

Question # 3

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

Question # 4

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

Question # 5

Neutrons are

Question # 6

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

Question # 7

The chemical properties of all the isotopes of an elements are

Question # 8

Neutron was discovered by

Question # 9

The half lie of radium-226 is

Question # 10

γ-rays behave like a particle because they explain the

Question # 11

Radioactivity was discovered by:

Question # 12

The counter, which also provides the power to the G.M. tube is called:

Question # 13

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

Question # 14

The range of particle depends upon the factor

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 isotope/s of hydrogen is /are:
A. Protium
B. Deuterium
C. Tritium
D. Both (A) and (B)
2 The chemical behaviour of an atom is determined by
A. binding energy
B. atomic number
C. mass number
D. number of isotopes
3 Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called
A. deuteron
B. deterium
C. protium
D. tritium
4 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
5 γ-rays behave like a particle because they explain the
A. Compton effect
B. Photoelectric effect
C. Pair-production
D. all the above
6 How much time, theα-particle more massive than an electron
A. 600
B. 7000
C. 5000
D. 15000
7 Fraction of the decaying atoms per unit time is called
A. decay atom
B. decay element
C. decay constant
D. decay
8 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
9 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
10 Alfa , beta and gamma rays are emitted from a radio-active substance
A. spontaneously
B. when it is heated
C. when it is exposed to light
D. When it interacts with the other particle

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