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

Define decay constant.

  • Ans 1: Decay constant of any element is to the fraction of the decaying atoms per unit time.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 1

Question # 1

Define decay constant.

  • Ans 1: Decay constant of any element is to the fraction of the decaying atoms per unit time.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 2

Question # 1

What do you mean by critical mass and critical volume?

  • Ans 1: The mass of uranium in which one neutron out of all neutron out of all neutron produced in one fission reaction produces further fission reaction is called critical mass.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 3

Question # 1

Differentiate between controlled and uncontrolled reaction.

  • Ans 1: To maintain a sustained controlled nuclear reaction,for every 2 or 3 neutrons released ,only one must be allowed to strike another uranium nucleus.it is called controlled chain reaction.
  • Ans 2: If more than one neutron produces further fission then it will grow uncontrolled and called uncontrolled chain reaction.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 4

Question # 1

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

  • Ans 1: The relation between decay constantλand the half line (T1/2) isλT1/2=0.693
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 5

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.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation