ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

Define Hadrons and Leptons.

Ans 1: Hadrons: These are not elementary particle,They are composed of other elementary particle called quarks.The example of hadrons are protons,neutrons,mesons etc,They experience strong nuclear force.
Laptons: The are elementary particles.They do not experience strong nuclear force,The example of laptons are electrons .muons and neutrinos etc.

Question # 2

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 # 3

Write name of different quarks.

Ans 1: The name of different quarks are as follows
Up,Down-Strange ,Charm,Top,Bottom

Question # 4

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 # 5

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 # 6

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 # 7

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 # 8

Distinguished between nuclear fission and nuclear fusion.

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

Question # 9

Define decay constant.

Ans 1: Decay constant of any element is to the fraction of the decaying atoms per unit time.

Question # 10

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

Ans 1: When no radioactive source is placed near the radiation detector,it records radiation,These radiations are called background radiations..
Its source are
1. Cosmic rays
2. presence of radioactive substance Earth crust and atmosphere.

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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

Define Hadrons and Leptons.

Define background radiations.What are their sources?

Write name of different quarks.

Why are heavy nuclei unstable?

Differentiate between controlled and uncontrolled reaction.

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

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

Distinguished between nuclear fission and nuclear fusion.

Define decay constant.

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

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

Define Hadrons and Leptons.

Define background radiations.What are their sources?

Write name of different quarks.

Why are heavy nuclei unstable?

Differentiate between controlled and uncontrolled reaction.

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

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

Distinguished between nuclear fission and nuclear fusion.

Define decay constant.

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

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

What is half line?

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

Why moderators are used in the core of nuclear reactor?

Define fission and fusion reaction.

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

Define decay constant.

Distinguished between nuclear fission and nuclear fusion.

Write names of hydrogen isotopes.

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

What do you know about Radioactivity?

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

Define fission and fusion reaction.

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

What are isotopes?What do you have in common?

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

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

Write names of hydrogen isotopes.

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

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

Write name of different quarks.

Define background radiations.What are their sources?

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

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?

How can radioactivity help in the treatment of cancer?

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

What is half line?

How energy released when 1 amu converted into energy?

Define fission and fusion reaction.

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

What do you mean by critical mass and critical volume?

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

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

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

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

Define Half line and discuss its dependence.

Differentiate between Baryons and Mesons.

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

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

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

12th Class Physics
Short Questions Preparation