ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

Why are heavy nuclei unstable?

Ans 1: Heavy nuclei are unstable because their binding energy per nucleon is less than lighter nuclei.So less energy is required to break heavy nuclei and they become unstable.

Question # 2

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 # 3

Define fission and fusion reaction.

Ans 1: Fission: Such a reaction in which a heavy nucleus like that of uranium splits up into two nuclei of roughly equal size along with the emission of energy is called fission reaction.
Ans 2: Fusion: A reaction in which two light of nuclei merge to form a heavy nucleus is called fusion reaction.It requires very high temperature.

Question # 4

Briefly give the use of (a)Wilson cloud chamber (b)G.M counter.

Ans 1: Wilson Cloud Chamber:It provides information about the change in mass and energy of radiating particles.
G.M Counter:It is used to determine the range and penetrating power of ionizing particles.

Question # 5

Wh Geiger counter is not suitable for fast counting?

Ans 1: Geiger counter is not suitable for fast counting because of its longer dead time.The positive ions take several time as long to reach the outer cathode,because positive ions are very massive than the electrons.During this time further incoming particle can not be counted,This time is called as the dead time of counter which delays fast counting system.

Question # 6

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 # 7

What do you mean by quark?

Ans 1: Quark is the basic building block of mesons and baryons.In actual it is the basic building block matter,It is proposed by Murray Gell-Mann and G.Zweig .It is of six types: up,down,strange,charm,bottom and top.

Question # 8

How can radioactivity help in the treatment of cancer?

Ans 1: It helps in treatment of cancer:
1. Cobalt-60 is used in radiotherapy.
2. For skin cancer ,phosphorus -32 or strontium-9 is used.
3. Radioactive iodine-131 is used to cure cancer of thyroid gland.

Question # 9

Define half-line of radioactive element.How is it related with decay constant?

Ans 1: Half-line:T_1/2is the period in which half of the atom of a radioactive element decay.
It is related with a decay constant by formula.
T_1/2= 0.693/Λ

Question # 10

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.

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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

Why are heavy nuclei unstable?

Describe the principle of operation of solid state detector?

Define fission and fusion reaction.

Briefly give the use of (a)Wilson cloud chamber (b)G.M counter.

Wh Geiger counter is not suitable for fast counting?

What is the function of control rods in nuclear reactor?

What do you mean by quark?

How can radioactivity help in the treatment of cancer?

Define half-line of radioactive element.How is it related with decay constant?

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

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

Why are heavy nuclei unstable?

Describe the principle of operation of solid state detector?

Define fission and fusion reaction.

Briefly give the use of (a)Wilson cloud chamber (b)G.M counter.

Wh Geiger counter is not suitable for fast counting?

What is the function of control rods in nuclear reactor?

What do you mean by quark?

How can radioactivity help in the treatment of cancer?

Define half-line of radioactive element.How is it related with decay constant?

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

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

What is radioactivity decay?Give an example.

Why moderators are used in the core of nuclear reactor?

What are isotopes?What do you have in common?

What is self-quenching in Geiger Muller Counter?

Define mass defect and binding energy.

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 is the function of control rods in nuclear reactor?

If nucleus has a life of one year,does this mean that it will be completely decayed after two years?

What do you know about Radioactivity?

Briefly describe the term radiography.

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

Differentiate between parent and daughter element.

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

What do you understand by "background radiation "?State two source of this radiation?

Write name of different quarks.

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

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

Define mass defect and binding energy.

If nucleus has a life of one year,does this mean that it will be completely decayed after two years?

Distinguished between nuclear fission and nuclear fusion.

Why moderators are used in the core of nuclear reactor?

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

Distinguished between nuclear fission and nuclear fusion.

Define nuclear fission.

What is the function of control rods in nuclear reactor?

How alpha and beta may ionize an atom without directly hitting the electrons?

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

Define decay constant.

If you swallowed a alpha source and beta source ,which would be more dangerous to you ?Explain

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

If nucleus has a life of one year,does this mean that it will be completely decayed after two years?

What are isotopes?What do you have in common?

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

Wh Geiger counter is not suitable for fast counting?

What is half line?

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 do you mean by critical mass and critical volume?

Define fission and fusion reaction.

Define background radiations.What are their sources?

12th Class Physics
Short Questions Preparation