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 a brief account of interaction of various types of radiations with matter.

  • Ans 1:
    1. An a particle has well defined range in a medium ,before coming to rest which is called range if a-particle.
    2. It lose its energy due to excitation and ionization of atoms and molecules in matter.
  • Ans 2: b-particle:
    1. The ionizing ability of b particles is about 100 times less than that of a alpha particle.
    2. The range of b particle is 100 times more than that of a- particle.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 1

Question # 1

Describe a brief account of interaction of various types of radiations with matter.

  • Ans 1:
    1. An a particle has well defined range in a medium ,before coming to rest which is called range if a-particle.
    2. It lose its energy due to excitation and ionization of atoms and molecules in matter.
  • Ans 2: b-particle:
    1. The ionizing ability of b particles is about 100 times less than that of a alpha particle.
    2. The range of b particle is 100 times more than that of a- particle.
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ICS Part 2 Physics Chapter 21 Short Questions Preparation - Set 2

Question # 1

What is radioactive tracer?Give its one application each in industry and medicine.

  • Ans 1: Radioactive tracer is a radioactive isotope which acts as an indicator or tracer that makes it possible to follow the course of a chemical or biological process.They are used in
    1. Medicine to detect malignant tumors
    2. Agriculture to study the uptake of a fertilizer by a plant.
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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

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 5

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