ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

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.

Question # 2

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 # 3

Describe the principle of operation of solid state detector?

Ans 1: A solid state detector is a specially designed p-n junction operating under a reversed bias in which electron-hole pairs are produced by the incident radiation to cause a current pulse to flow through the external circuit.

Question # 4

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 # 5

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 # 6

Define absorbed dose and Gray.

Ans 1: Absorbed dose:It is defined as the amount of energy absorbed from an ionizing radiation per unit mass of the absorbing body i.e.
Absorbed dose=energy/mass
Gray: it is defined as the amount of energy equal to one joule absorbed by a body of mass 1kg i.e
gray=1 joule/1 kg

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

What do you mean by critical mass and critical volume?

Ans 1: The mass of uranium in which one neutron out of all neutron out of all neutron produced in one fission reaction produces further fission reaction is called critical mass.

Question # 9

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 # 10

Differentiate between Baryons and Mesons.

Ans 1: Baryons:The particle equal in mass greater than protons are called baryons.It is made by 3 quarks.
Ans 2: Mesons: The particle which are lighter in mass than protons are called mesons,A pair of quark and an antiquark makes as meson.

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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

Wh Geiger counter is not suitable for fast counting?

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

Describe the principle of operation of solid state detector?

Define background radiations.What are their sources?

How can radioactivity help in the treatment of cancer?

Define absorbed dose and Gray.

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

What do you mean by critical mass and critical volume?

What is self-quenching in Geiger Muller Counter?

Differentiate between Baryons and Mesons.

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

Wh Geiger counter is not suitable for fast counting?

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

Describe the principle of operation of solid state detector?

Define background radiations.What are their sources?

How can radioactivity help in the treatment of cancer?

Define absorbed dose and Gray.

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

What do you mean by critical mass and critical volume?

What is self-quenching in Geiger Muller Counter?

Differentiate between Baryons and Mesons.

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

What factor make a Fusion reaction difficult to achieve?

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

Differentiate between Baryons and Mesons.

What do you know about Radioactivity?

Write name of different quarks.

Why moderators are used in the core of nuclear reactor?

Write names of hydrogen isotopes.

Differentiate between controlled and uncontrolled reaction.

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

Briefly describe the term radiography.

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

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

State two characteristics of beta particle.

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

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?

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

Differentiate between parent and daughter element.

What factor make a Fusion reaction difficult to achieve?

Write names of hydrogen isotopes.

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

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

Why moderators are used in the core of nuclear reactor?

Define absorbed dose and Gray.

What is self-quenching in Geiger Muller Counter?

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

Define mass defect and binding energy.

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

Protons and neutron are formed by what types of quarks?

Why are heavy nuclei unstable?

State two characteristics of beta particle.

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

Define fission and fusion reaction.

Define decay constant.

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

Differentiate between Baryons and Mesons.

What is radioactivity decay?Give an example.

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

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

12th Class Physics
Short Questions Preparation