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

Fraction of the decaying atoms per unit time is called

Question # 2

Phenomenon of radioactivity is due to disintegration of

Question # 3

Radioactivity was discovered by:

Question # 4

The range of particle depends upon the factor

Question # 5

When radioactive nucleus emits aβ-particle, the proton-neutron ratio

Question # 6

The chemical properties of an element depends upon the number of

Question # 7

The figure 1.007276μ shows the mass of an:

Question # 8

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

Question # 9

Which of these is not a radiation detector

Question # 10

Neutron was discovered in

Question # 11

A mass spectrograph sort out

Question # 12

The most abundant isotope of neon is

Question # 13

Gamma rays consist of steam of

Question # 14

If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be

Question # 15

The energy is found from Einstein's mass energy relation is called

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
2 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
3 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule
4 The range of particle depends upon the factor
A. charge, mass and energy of particle
B. density of medium
C. ionization potential of the atoms
D. all the above
5 Charge on neutron is
A. 1.6 x 10-19C
B. zero
C. -1.6 x 10-19C
D. 1.2 x 10-19C
6 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
7 γ-rays are
A. electrostatic waves
B. electromagnetic waves
C. heavy particles
D. longitudinal waves
8 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
9 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
10 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze

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