Question

15. Name some electric appliances where the heating effect of the electric current is used
16. Explain why concave mirror is known as a converging mirror
17. A special kind of soil is used for making Matkas and Surahis Name it​

Answer 1

Answer:

1. The heating effect of electric current is utilised in the working of electrical heating appliances such as electric room heater, electric iron, electric kettle, electric toaster, electric oven, water heater (geyser), immersion rod, and soldering iron, etc.

2. Concave mirrors are called "converging mirrors" because they tend to collect light that falls on them, refocusing parallel incoming rays toward a focus.In other words it converges the ray of light which strucks its surface.

3.Clayey soil

Explanation:

1.The appliances which we use in our house such as electric kettle, electric toaster etc. they convert electrical energy into heat energy.Therefore, they are the examples of heating effect of the electric current

2.Concave mirror best example is the inside surface of a spoon.When we look ourselves in it, the image formed is of small size because ray of light converge towards the principle axis.