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Physics / Transfer of Heat

Physics / Transfer of Heat

You wrap up in blankets in the winter, hold your hands out to feel the warmth of a fire, and jump due to accidental touch of hot object. What is this thing which you call as heat? Heat is form of energy. Greater the heat energy content, hotter will be the body.
Heat is transferred from a body at a higher temperature to a body at lower temperature. The effects of heat on an object are

  • Change in temperature of a body
  • Change in shape of a body
  • Change of state of matter

Conduction, convection, and radiation are the different methods of heat transfer.

  • Conduction- process of heat transfer from hot end to cold end from particle to particle of medium without actual movement of particles.
  • Convection- process of heat transfer by actual movement of the medium particles.
  • Radiation- process of heat transfer in which heat directly passes from one body to other body without affecting the medium. There are invisible electromagnetic waves responsible for heat transfer by radiation.

Find out whether conduction, convection and radiation is possible through vacuum. Learn about green house effect and its consequences.

Exercises
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Exercises
Lessons
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  • Transfer of Heat - SmartTest

    A SmartTest on Transfer of Heat

    • Accessed by: 150 Students
    • Average Time: 00:03:02
    • Average Score: 68.51
    • Questions: 31
    • Introduction to transfer of heat
    • Conduction process
    • Good and bad conductors of heat and their practical usage
    • Heat conduction through liquids
    • Heat conduction through gases
    • Convection process
    • Consequences and practical uses of convection
    • Radiation process
    • Absorption power of a body
    • Emission power of a body
    • Green house effect
    • Transfer of heat review
  • Transfer of Heat -- Summary

    Learnhive Lesson on Transfer of Heat

    • Accessed by: 125 Students

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