Heating Effect Of Electric Current Try touching a torch bulb that is lit and another that is not. Be careful when you touch the lit bulb. Do you feel it is hot to touch? Why do you think it is so?In a bulb, an electric current passes through a very thin wire made of a special material (such as tungsten) called the filament. When the bulb is switched on, the filament gets … [Read more...] about What Is Heating Effect Of Electric Current