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

    Which of these metals is the bad conductor of electricity?

    Right Option : D
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    Question : 2

    Which metal is the best conductor of heat? 

    Right Option : C
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    Explanation
    Question : 3

    Why are cooking utensils made of metals?

    Right Option : C
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    Explanation
     
     


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