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

Mass of neutron is

Question # 2

The chemical properties of all the isotopes of an elements are

Question # 3

Neutron was disvovered by:

Question # 4

The unit of decay constant is

Question # 5

Which of the following material has longer half life

Question # 6

Radiation detector are used to

Question # 7

Which of these is not a radiation detector

Question # 8

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

Question # 9

The number if neutrons in the nucleus of 92U235are

Question # 10

Mass of proton is

Question # 11

Radioactivity was discovered by

Question # 12

Radioactivity

Question # 13

The amount of energy equivalent to 1 a.m.u is

Question # 14

An alpha particle has a charge of

Question # 15

There is present in paraffin a large amount of:

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ECAT Chapter 21 Important MCQ's

Sr.# Question Answer
1 1 amu is equal to
A. 1.66 x 10-24kg
B. 1.66 x 10-19kg
C. 1.66 x 10-34kg
D. 1.66 x 10-27kg
2 The total charge of any nucleus is given as
A. Ze2
B. Z2e
C. Z/e
D. Ze
3 During the nuclear changes, the law/s of conservation that hold/s are that of:
A. Charge
B. energy
C. Momentum
D. Mass
4 If 'V' is the relativistic speed and 'C' is the speed of light then according to Einstien the factor V/C must always be
A. Equal to 1
B. Less than 1
C. Greater than 1
D. Infinity
5 When thorium nucleus emits aβ-particle, the daughter nucleus is called:
A. Protactinium
B. Actinium
C. Uranium
D. Radium
6 The diameter of an atom is of the order
A. 10-125m
B. 10-11m
C. 10-10m
D. 10-9m
7 The time required for a radioactive material to decrease in active by one half is called
A. half time
B. half life
C. disintegration time
D. mean life
8 An alpha particle has a charge of
A. +2e
B. -2e
C. -e
D. +3e
9 The distance travelled byα-particle in a medium before coming to rest, is called
A. range ofγ-particle
B. range of neutrons
C. range of particle
D. none of these
10 Phenomenon of radioactivity is due to disintegration of
A. nucleus
B. neutron
C. proton
D. molecule

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