Name the appliances each, where heating effect is a)desirable ,b) undesirable
Answers
Answer:
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.
Answer:
Three appliances which uses the 'heating effect of current' are light bulb, electric toaster and electric iron. Explanation: When a current flows through a conductor it produces heat in it.