Do all bulbs we use work on the principle of heating effects of electric current ? Discuss.

Explanation

No, filament bulbs we use work on heating effect of electric current. In these bulbs, in addition to light, lot of unwanted heat is also generated and this results in the wastage of electricity. We have different types of bulbs, known as fluorescent tube lights which work on a different principle. By using them we can reduce wastage of current. Compact fluorescent lamps (CFL) also reduce wastage and can be fixed in the ordinary bulb holders.