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

Different radioactive material have

Question # 3

Charge on proton is

Question # 4

The energy acquired by a mass of 1g moving with the speed of light is

Question # 5

The time required for a radioactive material to decrease in active by one half is called

Question # 6

γ-rays behave like a particle because they explain the

Question # 7

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

Question # 8

The number of all the protons and neutrons in a nucleus is known as

Question # 9

The number of isotopes of hydrogen are

Question # 10

1 amu is equal to

Question # 11

Mass of neutron is

Question # 12

When certain nucleus emits anα particle, its mass number:

Question # 13

The unit of decay constant is:

Question # 14

There is present in paraffin a large amount of:

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 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
2 The counter, which also provides the power to the G.M. tube is called:
A. Thin mica window
B. thin glass window
C. Airy window
D. Wooden window
3 Which are not the elementary particles?
A. Photons
B. Leptons
C. Hadrons
D. Quarks
4 A particle having the mass of electron and charge of a proton is called a
A. photon
B. position
C. antiproton
D. antineutrino
5 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
6 A mass spectrograph sort out
A. molecules
B. atoms
C. elements
D. isotopes
7 Neutron was suggested to be in the nucleus by:
A. Rutherford in 1920
B. Bohar in 1913
C. Dirac in 1928
D. Anderson in 1932
8 For an atom having atomic number Z and atomic weight A, the charge on the nucleus is
A. A - Z
B. A + Z
C. Z
D. A
9 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
10 After alpha decay the atomic number of the atom
A. increase by four
B. decreases by two
C. increases by two
D. decrease by four

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