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

In Wilson cloud chamber, if tracks are thick, straight and continuous, then particle is

Question # 2

A proton consists of quarks which are.

Question # 3

Iodine -131 is used for the treatment by

Question # 4

The moderator used in a nuclear reactor

Question # 5

Number of Isotopes of Neon gas are

Question # 6

There is no charge in A and Z of any radioactive element by the emission of.

Question # 7

The unit of radioactivity is:

Question # 8

One joule of energy absorbed per kilogram of a body is

Question # 9

Half life of radon gas is

Question # 10

The number of protons in any atom are always equal to the number of

Question # 11

X -rays are similar in nature to.

Question # 12

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

Question # 13

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

Question # 14

Unit of decay constantλ is:

Question # 15

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

Question # 16

Gamma rays from cobalt -60 are used for treatment of.

Question # 17

The energy equivalent of 1 kg of matter is about:

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ICS Part 2 Physics Chapter 21 Online Test MCQ's

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Sr.# Question Answer
1 Half life of Uranium -239 is
A. 26.5 minutes
B. 24.5 minutes
C. 25.5 minutes
D. 23.5 minutes
2 Energy released by conversion of 1 amu is
A. 200 MeV
B. 931 MeV
C. 233 MeV
D. 243 MeV
3 Unit of decay constantλ is:
A. ms
B. m-1
C. m
D. S-1
4 A device that shows the visible path of ionizing particle is called.
A. GM counter
B. Solid state detector
C. Scalar
D. Wilson cloud chamber
5 The SI unit of decay constant is
A. m
B. m-1
C. S-1
D. Nm-1
6 The charge on Beta particle is
A. +e
B. -e
C. -2e
D. None of these
7 Cosmic rays consist of
A. Protons
B. High energy photons
C. Positron
D. All of above
8 Electrons are
A. Hadrons
B. Laptons
C. Quarks
D. Baryons
9 Cobalt -60 is the source for
A. Alpha rays
B. Gama rays
C. Beta rays
D. Neutron
10 Absorbed Dose 'D' is defined as
A. m/E
B. E/C
C. C/m
D. E/m
11 The building blocks of protons and neutrons are called.
A. Ions
B. Electrons
C. Positrons
D. quarks
12 The moderator used in a nuclear reactor
A. Sodium
B. Uranium
C. Graphite
D. Cadmium
13 The Unit of decay constant.
A. Second
B. (second)-1
C. m-1
D. mk
14 The background radiation to which we are exposed, on the average is.
A. 1 mSv per year
B. 2 mSv per year
C. 3 mSv per year
D. 4 mSv per year
15 Nuclear fission chain reaction is controlled by using.
A. Cadmium rods
B. Iron rods
C. Platinum rods
D. Steel rods
16 Bottom quark carries charge :
A. 2/3 e
B. -2/3 e
C. +1/3 e
D. -1 /3 e
17 1 amu is equal to
A. 1.0606 x 10-27 kg
B. 1.66 x 10-31 kg
C. 1.66 x 10-34 kg
D. 1.66 x 10-19 kg

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