Question

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

1. Thermal energy is transformed to potential energy.

2. Thermal energy is transformed to mechanical energy.

3. Chemical energy is transformed to electromagnetic energy.

4. Mechanical energy is transformed to electromagnetic energy.

Answer 1

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.

Answer 2

A generator converts mechanical energy into electrical energy.

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