Resistance (R) is proptional to 1/Area (A).For a thin wire of length l Resistance would be very large and no current should flow.Then why a thin wire melts or burns when voltage is applied.
It's the heating effect in the wire: the heat dissipated is the square of the current multiplied by the resistance.
It's the principle behind the fuse.
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Reistance
Re: Reistance
