Question

Define heating effect of electric current writes its two application

Answer 1

When a current flows through a conductor, heat energy generates in the conductor. The heating effects of electric current depend on three factors:

The resistance of the conductor. A higher resistance produces more heat .The time for which the current flows. The longer the time the amount of heat production is high. Higher the current the amount of heat generation is also large.

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. This equation is the Joule’s equation of electrical heating.

Joule’s law states the amount of heat production in a conductor is :

Directly proportional to the square of electric current flowing through it. Is directly proportional to the resistance of the conductor .Directly proportional to the time for which electric current flows through the conductor.