ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

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 # 2

What factor make a Fusion reaction difficult to achieve?

Ans 1: A fusion reaction requires large energy and temperature ,up to million degrees centigrades,So a fusion reaction is difficult to achieve.

Question # 3

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 # 4

Define decay constant.

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

Question # 5

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.

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

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 # 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

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

Ans 1: The relation between decay constantλand the half line (T_1/2) isλT_1/2=0.693

Question # 10

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.

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

What factor make a Fusion reaction difficult to achieve?

Define mass defect and binding energy.

Define decay constant.

What is self-quenching in Geiger Muller Counter?

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

How can radioactivity help in the treatment of cancer?

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

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

Wh Geiger counter is not suitable for fast counting?

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

What factor make a Fusion reaction difficult to achieve?

Define mass defect and binding energy.

Define decay constant.

What is self-quenching in Geiger Muller Counter?

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

How can radioactivity help in the treatment of cancer?

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

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

Wh Geiger counter is not suitable for fast counting?

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

Differentiate between parent and daughter element.

Why are heavy nuclei unstable?

How energy released when 1 amu converted into energy?

How can radioactivity help in the treatment of cancer?

Why moderators are used in the core of nuclear reactor?

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

Define mass defect and binding energy.

What are isotopes?What do you have in common?

Distinguished between nuclear fission and nuclear fusion.

Write name of different quarks.

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

Write names of hydrogen isotopes.

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

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

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

What is radioactivity decay?Give an example.

What do you mean by quark?

Differentiate between controlled and uncontrolled reaction.

Define decay constant.

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

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

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

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

Describe the principle of operation of solid state detector.

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

What is self-quenching in Geiger Muller Counter?

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

Write names of hydrogen isotopes.

What factor make a Fusion reaction difficult to achieve?

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

Define Hadrons and Leptons.

What is radioactivity decay?Give an example.

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

Protons and neutron are formed by what types of quarks?

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

Define fission and fusion reaction.

Define absorbed dose and Gray.

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

Describe the principle of operation of solid state detector?

Distinguished between nuclear fission and nuclear fusion.

12th Class Physics
Short Questions Preparation