ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

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 # 2

Differentiate between controlled and uncontrolled reaction.

Ans 1: To maintain a sustained controlled nuclear reaction,for every 2 or 3 neutrons released ,only one must be allowed to strike another uranium nucleus.it is called controlled chain reaction.
Ans 2: If more than one neutron produces further fission then it will grow uncontrolled and called uncontrolled chain reaction.

Question # 3

What do you know about Radioactivity?

Ans 1: The elements having charge number Z>82 are unstable and they emit invisible radiations which affect the photographic plate.Such element are called radioactive elements and this process is called radioactivity.

Question # 4

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

Ans 1: In a wilson cloud chamber
1. Alpha particle have larger mass and greater ionizing power so its path is straight.
2. Beta particle have less mass and less ionizing power,so its path is thinner shorter and discontinuous.
3. Gamma particle have no mass and high penetrating power,so its leaves no definite track along its path,

Question # 5

Describe the principle of operation of solid state detector.

Ans 1: The principle of operation of solid state detector is based upon the production of electron-hole pair to cause a pulse of current.

Question # 6

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 # 7

What are isotopes?What do you have in common?

Ans 1: Isotopes are such nuclei of an element that have the same charge number Z but have different mass number A.
It means ,in the nucleus the number of protons is the same but the number of neutrons is different.

Question # 8

How energy released when 1 amu converted into energy?

Ans 1: 1 amu= 1.66 x10^-27kg

the energy of 1 amu is 1 amu =1.494 x10^-10J
1 amu= 931 MeV

Question # 9

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 # 10

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.

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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 the function of control rods in nuclear reactor?

Differentiate between controlled and uncontrolled reaction.

What do you know about Radioactivity?

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

Describe the principle of operation of solid state detector.

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

What are isotopes?What do you have in common?

How energy released when 1 amu converted into energy?

Define fission and fusion reaction.

Why are heavy nuclei unstable?

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 the function of control rods in nuclear reactor?

Differentiate between controlled and uncontrolled reaction.

What do you know about Radioactivity?

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

Describe the principle of operation of solid state detector.

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

What are isotopes?What do you have in common?

How energy released when 1 amu converted into energy?

Define fission and fusion reaction.

Why are heavy nuclei unstable?

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

Distinguished between nuclear fission and nuclear fusion.

Define absorbed dose and Gray.

Briefly describe the term radiography.

What do you mean by critical mass and critical volume?

Write names of hydrogen isotopes.

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

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

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 energy released when 1 amu converted into energy?

Define fission and fusion reaction.

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

What is half line?

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?

Define mass defect and binding energy.

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

What are thermal reactors?

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

Differentiate between parent and daughter element.

What are isotopes?What do you have in common?

Define decay constant.

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

Why moderators are used in the core of nuclear reactor?

How energy released when 1 amu converted into energy?

Briefly describe the term radiography.

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.

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

Protons and neutron are formed by what types of quarks?

Define decay constant.

What do you mean by critical mass and critical volume?

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

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

Define decay constant.

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

Define absorbed dose and Gray.

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

What is self-quenching in Geiger Muller Counter?

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

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Short Questions Preparation