2nd Year Physics Chapter 21 Online MCQ Test for 12th Class Physics Chapter 21 (Nuclear Physics)

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Physics ICS Part 2 Chapter 21 Online MCQ's Test

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Question # 1

How many times, the alpha particle is more massive than electrons.

Question # 2

Cosmic rays consist of

Question # 3

Both Xenon and cesium have

Question # 4

Low level radiations effects

Question # 5

The activity of radioactive sample

Question # 6

When a nucleus emits an alpha particle, its atomic mass decreases by

Question # 7

Number of Isotopes of Neon gas are

Question # 8

If the following particle have the same energy, which particle has the shortest wave length.

Question # 9

The number of Isotopes of cesium are.

Question # 10

A radio active substance has a half life of four months. 3 -fourth of the substance will decay in:

Question # 11

X -rays are similar in nature to.

Question # 12

In Wilson cloud chamber, ß-particles leave

Question # 13

The place for soring the nuclear waste is

Question # 14

By emitting Beta particle and gama particle simultaneously the nucleolus changes in its charges by

Question # 15

A particles equal or greater in mass than of protons are called.

Question # 16

Which of the following is similar to electron.

Question # 17

A proton consists of quarks which are.

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 Number of Isotopes of Neon gas are
A. 2
B. 3
C. 4
D. 1
2 The radio active nuclide 86Ra228 decays by a series of emissions of three alpha particles and one beta particle. The nuclide X finally formed is:
A. 64X220
B. 86X222
C. 84X216
D. 88X215
3 The bnding energy for nucleus A is 7.7 Me V and that for nucleus B is 7.8 MeV. Which nucleus has the larger mass?
A. Nucleas A
B. Nucleus B
C. Less than nucleus
D. None of these
4 The potential difference between the top and bottom of a cloud chamber is of the order of
A. 290 v
B. 400 v
C. 1 kv
D. None of above
5 The quantity of U in the naturally occurring uranium is.
A. 0.2%
B. 0.3%
C. 0.7%
D. 0.4%
6 Gamma radiations are emitted due to:
A. De-excitation of atom
B. De-excitation of nucleus
C. Excitation of atom
D. Excitation of nucleus
7 The force which is responsible for the breaking up of the radioactive element is.
A. Weak nuclear force
B. Strong nuclear force
C. Electromagnetic force
D. Gravitational force
8 Before and after nuclear reaction the number of protons and neutrons:
A. Must be different 
B. Must be decreased
C. Must be increased
D. Remains same
9 There is no charge in A and Z of any radioactive element by the emission of.
A. Alpha particle
B. Beta particle
C. Gama particle
D. X- rays
10 A proton consists of quarks which are.
A. Two up, one down
B. One up, two down
C. All up
D. All down

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