Question

Name the factors on which the heat produced in a wire depends when current is passed in it, and state how does it depend on the factors stated by you.

Answer 1

Factors on which heat produced depends:

1. On the current of wire: The square of the current l flowing through the wire is directly proportional to the heat H produced by the wire, i.e. H ∝ I².
2. On the resistance of wire: The wire's resistance, R, is directly proportional to the heat, H, that it generates. i.e. H ∝ R.
3. On time: The quantity of heat H generated in the wire is proportionate to the duration t. during which current flows through it. i.e. H ∝ t.

From the above, H ∝ I²Rt or H =0.24 I²Rt.