ICS Part 2 Physics Chapter 21 Short Questions Preparation


12th Class Physics
Short Questions Preparation

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Online Short Questions For Chapter 10 "ICS Part 2 Physics Chapter 21 Short Questions Preparation "

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Physics - ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

Define nuclear fission.

  • Ans 1: 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.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 1

Question # 1

Define nuclear fission.

  • Ans 1: 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.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 2

Question # 1

Why are heavy nuclei unstable?

  • Ans 1: Heavy nuclei are unstable because their binding energy per nucleon is less than lighter nuclei.So less energy is required to break heavy nuclei and they become unstable.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 3

Question # 1

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

Question # 1

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

  • Ans 1: Half-line:T1/2is the period in which half of the atom of a radioactive element decay.
    It is related with a decay constant by formula.
    T1/2= 0.693/Λ
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 5

Question # 1

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.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation

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