Question

Which two types of energy are transferred from a bulb when a torch is switched on?

Answer 1

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♦The bulb converts electrical energy into both light energy and thermal energy, though it makes more light than heat.♦

♦electrical energy♦

♦It can only change its form. In the case of an electric bulb, the electrical energy is converted to light and heat. The amount of electrical energy put into a bulb = the amount of light energy (desirable form) plus the heat energy that comes out of the bulb (undesirable form).♦