ECAT Pre Engineering Physics Chapter 21 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 21 Nuclear Physics

Try The 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

The chemical properties of an element depends upon the number of

Question # 2

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

Question # 3

How much time, theα-particle more massive than an electron

Question # 4

U-238 present in the natural uranium is about:

Question # 5

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

Question # 6

Radioactivity was discovered by:

Question # 7

Alfa particles are

Question # 8

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 # 9

Neutron was discovered in

Question # 10

Which of these is not a radiation detector

Question # 11

In wilson cloud chamber, the air becomes saturated with:

Question # 12

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

Question # 13

A curie represents a very strong source of

Question # 14

A particle having the mass of electron and charge of a proton is called a

Question # 15

In 1932 Chadwick discovered

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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 Examples of moderators used in a fission reactor is/are:
A. Water
B. Heavy water
C. Carbon
D. Hydrocarbon
3 The rate of decay of a radioactive substance
A. decrease exponentially with time
B. decreases linearly with time
C. increases linearly with time
D. increases exponentially with time
4 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
5 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
6 A curie represents a very strong source of
A. α-particle
B. β-particle
C. γ-particle
D. none of these
7 If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by
A. -4
B. 4
C. 2
D. 1
8 Radiation detector are used to
A. measure intensity of radiation
B. measure energy of radiation
C. difference between different types of radiation
D. all the above
9 Curie is a unit of
A. reluctance
B. resistivity
C. binding energy
D. radioactivity
10 Structure of the nucleus was explained by
A. J.J Thomson
B. Bohr
C. Millikan
D. Rutherford

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