ICS Part 2 Physics Chapter 21 Short Questions Preparation


12th Class Physics
Short Questions Preparation

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Physics - ICS Part 2 Physics Chapter 21 Short Questions Preparation

Question # 1

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.
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Prepare Complete Set Wise Questions For Chapter 10 "ICS Part 2 Physics Chapter 21 Short Questions Preparation "

ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 1

Question # 1

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

Question # 1

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

Question # 1

Distinguished between nuclear fission and nuclear fusion.

  • Ans 1: Nuclear Fission: Such a reaction in which a heavy nuclei like that of uranium splits up into two of roughly equal size along with the emission of energy is called fission reaction.
  • Ans 2: Nuclear Fusion:A reaction in which two lights nuclei merge to form a heavy nucleus is called fusion reaction.It require very high temperature.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 4

Question # 1

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

Question # 1

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.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation

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