Question

Which statement describes how a generator works?

A. It transforms wire wrapped around a nail into a battery.
B. It uses an electric current in a magnetic field to produce motion.
C. It uses motion of a wire coil in a magnetic field to produce
electricity
D. It transforms electrical energy into mechanical energy.

Answer 1

Answer: C

Step-by-step explanation:

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Answer 2

It uses motion of a coil thru a magnetic field.

The energy produced is not free:

It takes work to move the wire thru the magnetic field to produce the electrical energy-- the efficiency of the generator would be:

the electrical energy produced / mechanical energy input