Question

give the dependence of amount of heat produced in a wire when electric current is passed through it .​

Answer 1

When current is passed in a wire, the heat produced in it depends on the three factors; i) on the amount of current passing through the wire. (ii) on the resistance of the wire and (iii) on the time for which current is passed in the wire.

i) Dependence of heat produced on the current in the wire: The amount of heat H produced in the wire is directly proportional to the square of current I passing through the wire, i.e. H∝I  

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ii) Dependence of heat produced on the resistance of a wire: The amount of heat H produced in the wire is directly proportional to the resistance R of the wire, i.e., H∝R  

iii) Dependence of heat produced on the time: The amount of heat H produced in the wire is directly proportional to the time t for which current is passed in the wire, i.e.H∝t.

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