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

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Question # 1

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

Question # 2

The half lie of radium-226 is

Question # 3

Which of the following material has smaller has life

Question # 4

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

Question # 5

When thorium nucleus emits aβ-particle, the daughter nucleus is called:

Question # 6

Hydrogen atom with only one proton in its nucleus, and one electron in its orbit is called

Question # 7

The penetration power ofβ-particle is

Question # 8

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

Question # 9

Pair production take place when energy ofγ-rays photon is

Question # 10

For Protium, the mass defect is:

Question # 11

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

Question # 12

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

Question # 13

The reciprocal of decay constant λ of a radioactive material is:

Question # 14

Mass of neutron is

Question # 15

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

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 For an atom having atomic number Z and atomic weight A, the number of electron in an atoms
A. A - Z
B. A + Z
C. Z
D. A
2 The energy is found from Einstein's mass energy relation is called
A. binding energy of electron
B. binding energy of proton
C. binding energy of neutron
D. binding energy of nucleus
3 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
4 The number of isotopes of hydrogen are
A. 2
B. 1
C. 3
D. 4
5 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
6 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
7 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford
8 The number if neutrons in the nucleus of 92U235are
A. Infinite
B. 92
C. 235
D. 143
9 The unit of decay constant is:
A. Second
B. Metre
C. Hour
D. Year
10 The chemical properties of an element depends upon the number of
A. electron
B. position
C. photons
D. neutrons

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