ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

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

Ans 1: As alpha particle have greater energy and ionizing power than beta particle,so alpha particle are more dangerous than beta particle.
Critical volume:The volume of critical mass is called critical volume.

Question # 2

How energy released when 1 amu converted into energy?

Ans 1: 1 amu= 1.66 x10^-27kg

the energy of 1 amu is 1 amu =1.494 x10^-10J
1 amu= 931 MeV

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

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

Ans 1: Since
absorbed dose=D=energy/mass
energy=D * Mass
since the mass of whole body is much greater than mass of the hand,therefore 1 Gy dose given to the entire body deposit more energy.

Question # 5

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 # 6

What is the function of control rods in nuclear reactor?

Ans 1: Controls rods made of Cadmium or Boron are used for the control of number of neutrons,so that of all the neutrons produced in fission ,only one neutrons produces further fission reaction.
In case of emergency or for repair purpose control rods are used to stop the chain reaction and shut down the reactor.

Question # 7

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 # 8

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 # 9

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 # 10

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

Latest Educational News Stories

Pakistan's Largest Database of Colleges and Universities

BS Programs

University Past Papers

University Results

Exam Results 2024

Study Abroad Programs and Opportunities for Pakistani Students

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

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

How energy released when 1 amu converted into energy?

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

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

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

What is the function of control rods in nuclear reactor?

Define background radiations.What are their sources?

Define fission and fusion reaction.

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

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

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

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

How energy released when 1 amu converted into energy?

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

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

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

What is the function of control rods in nuclear reactor?

Define background radiations.What are their sources?

Define fission and fusion reaction.

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

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

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

Differentiate between controlled and uncontrolled reaction.

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

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

What do you know about Radioactivity?

How can radioactivity help in the treatment of cancer?

Write names of hydrogen isotopes.

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

Define absorbed dose and Gray.

Why moderators are used in the core of nuclear reactor?

Describe the principle of operation of solid state detector.

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

Differentiate between controlled and uncontrolled reaction.

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

What factor make a Fusion reaction difficult to achieve?

Define mass defect and binding energy.

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

Protons and neutron are formed by what types of quarks?

What are thermal reactors?

Describe the principle of operation of solid state detector.

Wh Geiger counter is not suitable for fast counting?

What is the function of control rods in nuclear reactor?

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

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

What is radioactivity decay?Give an example.

What do you mean by quark?

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

What is self-quenching in Geiger Muller Counter?

How energy released when 1 amu converted into energy?

Wh Geiger counter is not suitable for fast counting?

Distinguished between nuclear fission and nuclear fusion.

Protons and neutron are formed by what types of quarks?

State two characteristics of beta particle.

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

What is radioactivity decay?Give an example.

What factor make a Fusion reaction difficult to achieve?

What is the function of control rods in nuclear reactor?

What is half line?

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

Define absorbed dose and Gray.

What are thermal reactors?

12th Class Physics
Short Questions Preparation