ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

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 # 2

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.

Question # 3

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 # 4

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 # 5

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

Ans 1: As alpha and beta are electrically charged particle,so they can cause ionization without hitting an atom either by,repellings the electron of target particle.

Question # 6

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 # 7

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 # 8

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

Ans 1: No it will not decay completely after two years.
Numbers of atom at initial stage =N_o
number of atoms decayed after first year =1/2N_o

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

What is self-quenching in Geiger Muller Counter?

Ans 1: A small amount of gas is added into the GM counter is called self quenching or internal quenching,In GM counter the phenomena of quenching is to save the counter from spurious or false counts.

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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 background radiations.What are their sources?

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

Differentiate between controlled and uncontrolled reaction.

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

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

Describe the principle of operation of solid state detector.

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

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

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

What is self-quenching in Geiger Muller Counter?

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 background radiations.What are their sources?

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

Differentiate between controlled and uncontrolled reaction.

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

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

Describe the principle of operation of solid state detector.

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

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

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

What is self-quenching in Geiger Muller Counter?

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

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

Name the basic forces of nature.

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

What is the function of control rods in nuclear reactor?

Briefly describe the term radiography.

Describe the principle of operation of solid state detector.

Define decay constant.

What do you know about Radioactivity?

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

What do you mean by critical mass and critical volume?

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

State two characteristics of beta particle.

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

Define Hadrons and Leptons.

Define Half line and discuss its dependence.

Wh Geiger counter is not suitable for fast counting?

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 absorbed dose and Gray.

How energy released when 1 amu converted into energy?

Why moderators are used in the core of nuclear reactor?

What do you know about Radioactivity?

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

Differentiate between Baryons and Mesons.

What factor make a Fusion reaction difficult to achieve?

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

Briefly describe the term radiography.

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

Differentiate between parent and daughter element.

What do you mean by critical mass and critical volume?

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

Define decay constant.

Wh Geiger counter is not suitable for fast counting?

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

Wh Geiger counter is not suitable for fast counting?

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

Differentiate between parent and daughter element.

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

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

Define mass defect and binding energy.

Define background radiations.What are their sources?

12th Class Physics
Short Questions Preparation