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

Three quarks make:

Question # 2

The figure 1.007276μ shows the mass of an:

Question # 3

Neutrons are

Question # 4

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

Question # 5

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

Question # 6

A pair of quark and antiquark makes a:

Question # 7

Which of the following material has smaller has life

Question # 8

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

Question # 9

Nucleus of a hydrogen atom may contain:

Question # 10

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

Question # 11

Phenomenon of radioactivity is due to disintegration of

Question # 12

The rate of decay of a radioactive substance

Question # 13

Neutron was disvovered by:

Question # 14

Mass of proton is of order of

Question # 15

If a nucleus emits an alpha particle, its mass number decreases by 4 while charge number decreased by

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Which of these is not a radiation detector
A. Wilson cloud chamber
B. cyclotron acceleration
C. Geiger Miller counter
D. solid state detector
3 Pair production take place when energy ofγ-rays photon is
A. equal to 1.02 Mev-
B. greater than 1.02 Mev
C. less than 1.02 Mev
D. none of these
4 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
5 Radioactivity is
A. self disruptive activity
B. spontaneous activity
C. exhibited by all elements under proper conditions
D. both 'a' and 'b'
6 Neutrons are
A. positive charge
B. negatively charged
C. massless
D. neutral
7 Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:
A. 50
B. 100
C. 150
D. 200
8 For Protium, the mass defect is:
A. Infinite
B. Zero
C. Very large
D. A few grams
9 Nucleon means:
A. Only electrons
B. Only neutrons
C. Only protons
D. Both (A ) and (C)
10 The chemical properties of all the isotopes of an elements are
A. same
B. different
C. slightly different
D. none of these

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