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

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

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

Question # 1

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

Question # 1

Protons and neutron are formed by what types of quarks?

  • Ans 1: Protons is formed by two up and one down quarks.Neutron is formed by two down and one up quarks.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 4

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 - Set 5

Question # 1

What is half line?

  • Ans 1: The half line T1/2of a radioactive elements is that period in which half of the atoms decay.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation