Final answer:
Alternators in cars power components like lights and radios. They are a type of generator converting mechanical energy into electrical energy for the car's electric system.
Explanation:
In the context of automobiles, alternators are devices installed to power components such as lights and radios. An alternator is a type of device known as a generator, specifically an AC generator, which converts mechanical energy into electrical energy. It functions by charging the car's battery and providing power to the electric system while the engine is running.
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