ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

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 # 2

Define mass defect and binding energy.

Ans 1: Mass defect: The mass of the nucleus is always less than the total mass of the protons and neutrons that make up the nucleus,The difference of the two masses is called mass defect.
Binding energy:The missing mass is converted into energy at the formation of the nucleus and is called binding energy.

Question # 3

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 # 4

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

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 # 5

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 # 6

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 # 7

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

Ans 1: A particle with great power loses large amount of energy for small distances.That is,it produces more ionization but is less penetration.

Question # 8

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 # 9

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

Ans 1: Radioactive tracer is a radioactive isotope which acts as an indicator or tracer that makes it possible to follow the course of a chemical or biological process.They are used in
1. Medicine to detect malignant tumors
2. Agriculture to study the uptake of a fertilizer by a plant.

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

Define fission and fusion reaction.

Define mass defect and binding energy.

What are isotopes?What do you have in common?

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

Why are heavy nuclei unstable?

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

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

What do you know about Radioactivity?

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

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

Define fission and fusion reaction.

Define mass defect and binding energy.

What are isotopes?What do you have in common?

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

Why are heavy nuclei unstable?

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

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

What do you know about Radioactivity?

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

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

Define nuclear fission.

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

Define fission and fusion reaction.

What is radioactivity decay?Give an example.

What factor make a Fusion reaction difficult to achieve?

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

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

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

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

Define Hadrons and Leptons.

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

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 understand by "background radiation "?State two source of this radiation?

What do you know about Radioactivity?

Protons and neutron are formed by what types of quarks?

Define background radiations.What are their sources?

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

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

Briefly describe the term radiography.

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 4

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

What do you mean by quark?

Define fission and fusion reaction.

Wh Geiger counter is not suitable for fast counting?

Describe the principle of operation of solid state detector.

Why moderators are used in the core of nuclear reactor?

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

Describe the principle of operation of solid state detector?

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

State two characteristics of beta particle.

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

What are isotopes?What do you have in common?

Define Half line and discuss its dependence.

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

State two characteristics of beta particle.

Why moderators are used in the core of nuclear reactor?

Define nuclear fission.

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

12th Class Physics
Short Questions Preparation