ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

What is meant by dose of radiation?What is its SI units?

Ans 1: Radiation dose is a measure of the amount of exposure to radiation.There are three kinds of dose:
1. Absorbed dose: it is the amount of energy deposited by radiation in a mass.
D=E/m its SI unit is Gy.
2.Equivalent dose: It is calculated for individual organ
D_e=D*RBE
3.Effective dose: It is calculated for the whole body,It is also measured ni Sv.

Question # 2

Describe a brief account of interaction of various types of radiations with matter.

Ans 1:
1. An a particle has well defined range in a medium ,before coming to rest which is called range if a-particle.
2. It lose its energy due to excitation and ionization of atoms and molecules in matter.
Ans 2: b-particle:
1. The ionizing ability of b particles is about 100 times less than that of a alpha particle.
2. The range of b particle is 100 times more than that of a- particle.

Question # 3

Define background radiations.What are their sources?

Ans 1: When no radioactive source is placed near the radiations detector,it records radiations,These radiations are called background radiations.
Its source are
1. The cosmic rays which come to us from outer space.
2. Radioactive substance present is the Earth's crest.
3. Radioactive potassium and carbon in the body.

Question # 4

What are the relation between decay constantλand the half-line of a radioactive element?

Ans 1: The relation between decay constantλand the half line (T_1/2) isλT_1/2=0.693

Question # 5

Write down two advantages of solid state detector over geiger muller counter.

Ans 1: Solid state detector can count very fast than gas filled detector.
Solid state detector is much smaller in size.
It operates at low voltage.

Question # 6

Describe the principle of operation of solid state detector?

Ans 1: A solid state detector is a specially designed p-n junction operating under a reversed bias in which electron-hole pairs are produced by the incident radiation to cause a current pulse to flow through the external circuit.

Question # 7

What is the function of control rods in nuclear reactor?

Ans 1: Controls rods made of Cadmium or Boron are used for the control of number of neutrons,so that of all the neutrons produced in fission ,only one neutrons produces further fission reaction.
In case of emergency or for repair purpose control rods are used to stop the chain reaction and shut down the reactor.

Question # 8

Discuss the advantage and disadvantage of nuclear power compare to the use of fossil fuel generated power.

Ans 1: Advantage and disadvantage of nuclear power are given below compared to the use of fossil generated power.
Advantage:
1. Much more energy is produced.
2. Produces no environmental pollution.
3. Electricity produced in this way is far cheaper than fossil fuel generated power.
Disadvantage :
1. Uranium mining is more dangerous than coal mining.
2. Nuclear waster is very injurous and harmful to living things.
3. Nuclear waste can not be transported through area of population whereas fossil fuel can be.

Question # 9

Write names of hydrogen isotopes.

Ans 1: Three isotopes of hydrogen are:
1. Protium
2. Deuterium
3. Tritium

Question # 10

What are thermal reactors?

Ans 1: The thermal reactors are called thermal reactors because the neutrons must be slowed down to thermal energies to produce further fission,They use natural uranium or slightly enriched uranium as fuel.

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ICS Part 2 Physics Chapter 21 Short Questions Preparation

12th Class PhysicsShort Questions Preparation

12th Class Physics Chapter Wise Preparation

Online Short Questions For Chapter 10 "ICS Part 2 Physics Chapter 21 Short Questions Preparation "

Physics - ICS Part 2 Physics Chapter 21 Short Questions Preparation

What is meant by dose of radiation?What is its SI units?

Describe a brief account of interaction of various types of radiations with matter.

Define background radiations.What are their sources?

What are the relation between decay constantλand the half-line of a radioactive element?

Write down two advantages of solid state detector over geiger muller counter.

Describe the principle of operation of solid state detector?

What is the function of control rods in nuclear reactor?

Discuss the advantage and disadvantage of nuclear power compare to the use of fossil fuel generated power.

Write names of hydrogen isotopes.

What are thermal reactors?

Prepare Complete Set Wise Questions For Chapter 10 "ICS Part 2 Physics Chapter 21 Short Questions Preparation "

Set 1

Set 2

Set 3

Set 4

Set 5

ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 1

What is meant by dose of radiation?What is its SI units?

Describe a brief account of interaction of various types of radiations with matter.

Define background radiations.What are their sources?

What are the relation between decay constantλand the half-line of a radioactive element?

Write down two advantages of solid state detector over geiger muller counter.

Describe the principle of operation of solid state detector?

What is the function of control rods in nuclear reactor?

Discuss the advantage and disadvantage of nuclear power compare to the use of fossil fuel generated power.

Write names of hydrogen isotopes.

What are thermal reactors?

ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 2

Briefly describe the term radiography.

What information if revealed by the length and shape of track of an incident particle in Wilson Cloud Chamber?

What is half line?

Differentiate between controlled and uncontrolled reaction.

Distinguished between nuclear fission and nuclear fusion.

Describe a brief account of interaction of various types of radiations with matter.

What do you mean by quark?

What are thermal reactors?

Define background radiations.What are their sources?

What is meant by dose of radiation?What is its SI units?

ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 3

What are thermal reactors?

What is radioactive tracer?Give its one application each in industry and medicine.

What is meant by dose of radiation?What is its SI units?

Differentiate between controlled and uncontrolled reaction.

A particle which produce more ionization ,is less penetrating.Why?

Which radiation does would deposit more energy to the body(a)10 m Gy to the hand (b)1m Gy dose to entire body.

How can radioactivity help in the treatment of cancer?

Define mass defect and binding energy.

What are isotopes?What do they have common and what are their difference.

Define fission and fusion reaction.

ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 4

Define mass defect and binding energy.

Briefly describe the term radiography.

Describe the principle of operation of solid state detector.

What are the relation between decay constantλand the half-line of a radioactive element?

What is the function of control rods in nuclear reactor?

Define fission and fusion reaction.

What is radioactive tracer?Give its one application each in industry and medicine.

Which radiation does would deposit more energy to the body(a)10 m Gy to the hand (b)1m Gy dose to entire body.

What are isotopes?What do you have in common?

What are isotopes?What do they have common and what are their difference.

ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 5

What are thermal reactors?

Wh Geiger counter is not suitable for fast counting?

Define nuclear fission.

Discuss the advantages of fission power from point of view of safety,pollution and resources.

Name the basic forces of nature.

What factor make a Fusion reaction difficult to achieve?

Why are heavy nuclei unstable?

12th Class Physics
Short Questions Preparation