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

Which of the following material has longer half life

Question # 2

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

Question # 3

The figure 1.007276μ shows the mass of an:

Question # 4

Radiation detector are used to

Question # 5

Which of these is not a radiation detector

Question # 6

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

Question # 7

Referring to the above figure, the binding energy per nucleon increases upto mass number equal to:

Question # 8

Nucleus of a hydrogen atom may contain:

Question # 9

Heavy water is made of one oxygen atom and two atoms of:

Question # 10

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 # 11

The nucleus/nuclei of hydrogen is/are:

Question # 12

In wilson cloud chamber, the air becomes saturated with:

Question # 13

In radioactive decay, the new element which is formed due to the disintegration of original element is called

Question # 14

Electrons are

Question # 15

Three quarks make:

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ECAT Physics Chapter 21 Important MCQ's

Sr.# Question Answer
1 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
2 Marie curie and Pierre curie discovered:
A. Uranium
B. Polonium
C. Radium
D. Both (A) and (C)
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 The penetration power ofβ-particle is
A. zero
B. less thanα-particle
C. equal toα-particle
D. greater thanα-particle
5 Nucleus consists of
A. proton and neutron
B. protons and electron
C. electron and neutron
D. protons only
6 The nuclei of an element having the same charge number but different mass numbers are called:
A. Isobars
B. Isotopes
C. Isomers
D. Isobaric
7 When radioactive nucleus emits aβ-particle, the proton-neutron ratio
A. decrease
B. increase
C. same
D. none of these
8 The figure 1.007276μ shows the mass of an:
A. Atom
B. Positron
C. Electron
D. Neutron
9 The number of protons inside a nucleus is called
A. mass number
B. atomic weight
C. atomic number
D. none of these
10 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

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