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

Describe the principle of operation of solid state detector?

  • Ans 1: A solid state detector is a specially designed p-n junction operating under a reversed bias in which electron-hole pairs are produced by the incident radiation to cause a current pulse to flow through the external circuit.
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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

Describe the principle of operation of solid state detector?

  • Ans 1: A solid state detector is a specially designed p-n junction operating under a reversed bias in which electron-hole pairs are produced by the incident radiation to cause a current pulse to flow through the external circuit.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 2

Question # 1

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

Question # 1

Wh Geiger counter is not suitable for fast counting?

  • Ans 1: Geiger counter is not suitable for fast counting because of its longer dead time.The positive ions take several time as long to reach the outer cathode,because positive ions are very massive than the electrons.During this time further incoming particle can not be counted,This time is called as the dead time of counter which delays fast counting system.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 4

Question # 1

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

Question # 1

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

  • Ans 1: Radiation dose is a measure of the amount of exposure to radiation.There are three kinds of dose:
    1. Absorbed dose: it is the amount of energy deposited by radiation in a mass.
    D=E/m its SI unit is Gy.
    2.Equivalent dose: It is calculated for individual organ
    De=D*RBE
    3.Effective dose: It is calculated for the whole body,It is also measured ni Sv.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation