Question

Appliances based on heating effect of current work on

• A. only A.C.
• B. only D.C.
• C. both A.C. and D.C.
• D. none of these

Answer 1

The correct option is C both A.C. and D.C.

As heat produced depends upon resistance which has no relation with AC or DC but heat produced also depends upon current as $H\propto I^2$ so for heating effect both A.C. and D.C. can be used, that's why appliances based on heating effect can work on AC as well as DC. hence correct option is C.