alleryStart learning →What does an electric motor do?
ATransforms mechanical energy into electrical energy
BTransforms chemical energy into mechanical energy
CTransforms mechanical energy into chemical energy
DTransforms electrical energy into mechanical energy
Answer & Solution
Correct answer: D. Transforms electrical energy into mechanical energy
1. A motor is the functional opposite of a generator: it is supplied with electric current and produces rotation or motion.
2. The text's own answer key confirms: "An electric motor transforms electrical energy into mechanical energy."
3. The mechanical-to-electrical option describes a generator instead, and the two chemical-energy options describe neither device.
4. So an electric motor converts electrical energy into mechanical energy.
_Source: OpenStax Physics Ch 20 "Magnetism", p.691 §20.2 Motors, Generators, and Transformers_
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