ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

Why moderators are used in the core of nuclear reactor?

Ans 1: The moderator ae used in the core to slow the neutrons down so that they can be captured and keep the chain reaction going.

Question # 2

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 # 3

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 # 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

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 # 6

What are thermal reactors?

Ans 1: The thermal reactors are called thermal reactors because the neutrons must be slowed down to thermal energies to produce further fission,They use natural uranium or slightly enriched uranium as fuel.

Question # 7

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 # 8

What do you mean by quark?

Ans 1: Quark is the basic building block of mesons and baryons.In actual it is the basic building block matter,It is proposed by Murray Gell-Mann and G.Zweig .It is of six types: up,down,strange,charm,bottom and top.

Question # 9

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 # 10

Write names of hydrogen isotopes.

Ans 1: Three isotopes of hydrogen are:
1. Protium
2. Deuterium
3. Tritium

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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

Why moderators are used in the core of nuclear reactor?

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

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

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

Define mass defect and binding energy.

What are thermal reactors?

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

What do you mean by quark?

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

Write names of hydrogen isotopes.

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

Why moderators are used in the core of nuclear reactor?

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

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

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

Define mass defect and binding energy.

What are thermal reactors?

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

What do you mean by quark?

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

Write names of hydrogen isotopes.

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

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

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

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

Differentiate between controlled and uncontrolled reaction.

What are isotopes?What do you have in common?

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

Define Hadrons and Leptons.

Why moderators are used in the core of nuclear reactor?

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

What do you mean by critical mass and critical volume?

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

Wh Geiger counter is not suitable for fast counting?

Protons and neutron are formed by what types of quarks?

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

Differentiate between Baryons and Mesons.

Why moderators are used in the core of nuclear reactor?

Define Half line and discuss its dependence.

What do you know about Radioactivity?

Define absorbed dose and Gray.

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

Name the basic forces of nature.

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

Name the basic forces of nature.

How energy released when 1 amu converted into energy?

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

Wh Geiger counter is not suitable for fast counting?

Briefly describe the term radiography.

Define Hadrons and Leptons.

State two characteristics of beta particle.

Write name of different quarks.

Define decay constant.

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

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

Define decay constant.

Differentiate between parent and daughter element.

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

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

Define mass defect and binding energy.

Briefly describe the term radiography.

Describe the principle of operation of solid state detector.

12th Class Physics
Short Questions Preparation