ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

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

Neutron was suggested to be in the nucleus by:

Question # 2

Charge on proton is

Question # 3

The range ofβ-particle in air is greater than that ofα-particle by

Question # 4

The nucleus/nuclei of hydrogen is/are:

Question # 5

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

Question # 6

The half life of uranium-238 is

Question # 7

The unit of decay constant is:

Question # 8

The isotope/s of hydrogen is /are:

Question # 9

Rate of decay is actually described by.

Question # 10

The emission of radiations take place in elements, having charge number greater than

Question # 11

Which of the following material has smaller has life

Question # 12

Fraction of the decaying atoms per unit time is called

Question # 13

Gamma rays consist of steam of

Question # 14

Mass of proton is

Question # 15

The rate of decay of radioactive substance

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 Hydrogen atom with only one proton and one neutron in its nucleus, and one electron, is called
A. deuterium
B. protium
C. tritium
D. none of these
2 The energy acquired by a mass of 1g moving with the speed of light is
A. 3 x 108J
B. 9 x 1013J
C. 3 x 1013J
D. 9 x 1016J
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 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
5 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these
6 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
7 The half lie of radium-226 is
A. 238 years
B. 4.5 x 109days
C. 1620 years
D. 332 years
8 The amount of energy equivalent to 1 a.m.u is
A. 9.315 Mev
B. 93.15 Mev
C. 931.5 Mev
D. 2.22 Mev
9 Which of the following material has longer half life
A. radium
B. polonium
C. radium
D. uranium
10 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

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