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

ICS Part 2 Physics
Chapter 21 Test

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Physics ICS Part 2 Chapter 21 Online MCQ's Test

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Question # 1

Unit of decay constantλ is:

Question # 2

Controlling rods inserted into the reactor are of metal:

Question # 3

Before and after nuclear reaction the number of protons and neutrons:

Question # 4

When nitrogen is bombarded by alpha particles nitrogen nucleus changes into

Question # 5

The moderator used in a nuclear reactor

Question # 6

The background radiation to which we are exposed, on the average is.

Question # 7

The particles which do not experience strong force are called.

Question # 8

The mass of beta particle is equal to the mass

Question # 9

The most useful tracer is.

Question # 10

Both xenon and caesium each have:

Question # 11

James chadwick discovered:

Question # 12

Alpha particle carries a charge.

Question # 13

The number of neutrons in Li are

Question # 14

Materials can be identified by measuring their

Question # 15

Mass equivalent of 931 MeV energy is:

Question # 16

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

Question # 17

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

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FSc Part II Class Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 amu =
A. 1.06 x 10-27 kg
B. 1.6606 x 10-27 kg 
C. 1.520 x 10-21 kg
D. 1.6606 x 10-31 kg
2 Which particle has larger range in air.
A. Alpha rays
B. Gama rays
C. Beta rays
D. Neutron
3 The energy of photon for photoelectric effect is less than
A. 1 MeV
B. 2 MeV
C. 5 MeV
D. 8 MeV
4 Both Xenon and cesium have
A. 33 isotopes
B. 34 Isotopes
C. 36 Isotopes
D. 35 Isotopes
5 When nitrogen is bombarded by alpha particles nitrogen nucleus changes into
A. Oxygen
B. Carbon
C. Barium
D. Helium
6 The energy equivalent of 1 kg of matter is about:
A. 10-15 J
B. 1 J
C. 10-12J
D. 10-17J
7 The total charge of any nucleus is:
A. Ze
B. Z
C. Both a and b
D. None of above
8 James chadwick discovered:
A. Proton
B. Positron
C. Neutron
D. Electron
9 A radio active substance has a half life of four months. 3 -fourth of the substance will decay in:
A. 6 months
B. 8 months
C. 12 months
D. 16 months
10 Iodine -131 is used for the treatment by
A. Bones
B. Eyes
C. thyroid glands
D. Lungs

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