Question

What is joules heating effect of current P? Derive its expression

Answer 1

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Hence the heating effect produced by an electric current, I through a conductor of resistance, R for a time, t is given by H = I2Rt. ... Joule's law states the amount of heat production in a conductor is : Directly proportional to the square of electric current flowing through it.

Answer 2

Answer:

Joule heating is the physical effect by which the pass of current through an electrical conductor produces thermal energy. This thermal energy is then evidenced through a rise in the conductor material temperature, thus the term “heating”.

A quantitative form of Joule's law is that the heat evolved per second, or the electric power loss, P, equals the current I squared times the resistance R, or P = I2R.