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CBSE Class 10 Answered

if metals and alloys of high resistivity produce heat why cant insulator produce heat?
Asked by Vivek Menon | 26 Jun, 2013, 04:46: PM
answered-by-expert Expert Answer
Insulators can't conduct electricity because of very high resistance. Heat produced = I^2 R, and since no current flows through insulator, no heat is produced in an insulator. 
 
In the case of metals, since they can conduct electricity (despite being of high resistance in some cases), they can produce heat. 
Answered by | 26 Jun, 2013, 06:33: PM

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