How does an electric torch works
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Posted by Sheethal Gatty 7 years, 11 months ago
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Yogita Ingle 7 years, 11 months ago
A torch bulb consists of two terminals and a filament. The filament is a spirally wound wire inside the bulb supported by two thick wires at its ends. When the positive and the negative terminals of an electric cell are connected to the two terminals of a bulb, electricity passes through the filament and it starts glowing. The terminals of the bulb are fixed in such a way that they do not touch each other. In recent years, a different type of bulb has become popular - the compact fluorescent lamp (CFL). It is an energy-saving bulb, which has a longer life than an ordinary bulb.
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