Physical Property of Metal - Conductivity


 
 
Concept Explanation
 

Physical Property of Metal - Conductivity

Thermal conductivity of Metals:

Copper, silver, gold, aluminium and iron metals are good conductors of heat. Though all the metals are good conductors of heat, silver metal is the best conductor of heat.

  • Copper metal is a better conductor of heat than aluminium metal.
  • The cooking utensils (like a frying pan, etc.) are made of metals because metals are good conductors of heat .
  • Being a good conductor of heat, the metallic bottom of cooking utensil transfers the heat of gas stove quickly to the food kept inside it. We cannot hold a hot metal pan directly because it will conduct the heat quickly to our hand causing burns.
  • We have to hold a hot metal pan from its handle made of plastic or wood (because plastic and wood do not conduct heat).
  • The utensils we use in kitchen are made of zinc, copper and aluminium because these metals are good conductors of heat.

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    Sample Questions
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    Question : 1

    The metal which is best conductor of heat and electricity is _________

    Right Option : D
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    Question : 2

    Which of these metals is the bad conductor of electricity?

    Right Option : D
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    Question : 3

    Which of the following statements about metals is correct?

    A)  Silver is the best conductor of heat among all metals.

    B)  The electrical conductivity of metals increases with rising temperature.

    Right Option : C
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