Question

A generator contains a coil that spins to produce an electric current. How is energy transformed by using a generator?

Answer 1

A generator converts mechanical energy into electrical energy.

Hence, 4. Mechanical energy is transformed to electromagnetic energy is the correct answer.

Answer 2

It would be number four - Mechanical energy is transformed to electromagnetic energy.

The Potential Energy in the coil is transformed into spinning Mechanical Energy which converts into Kinetic Energy which eventually shifts into Electrical Energy.