The conversion of chemical energy into electrical energy and then into light and thermal energy occurs in which of the following cases?
When a flashlight is turned on
In a flashlight, the battery stores chemical energy which is converted into electrical energy when the circuit is switched on.
This electrical energy then flows through the bulb, where it is converted into light energy and, as a by-product, thermal (heat) energy.
A rotating fan converts electrical energy into mechanical energy, a burning candle converts chemical energy directly into light and heat without an electrical stage, and boiling water is a conversion into heat energy, so none follow the full chemical to electrical to light and thermal chain.
Hence, this sequence of conversions occurs when a flashlight is turned on.
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