Answer:
The answers are
Motors convert electrical energy into mechanical energy. Generators convert mechanical energy into electrical energy.
In large generators in power plants, ___magnets___ rotate inside a coil of wire to produce an electric current.
Explanation:
Motors are devices used to move loads, either linearly with a series of mechanisms or rotationally.
Many motors are modeled as inductors and resistors in series, where the power source is always of electrical nature. That is the reason for the answer number one.
For question 2, it can be proven with Maxwell's equations, that varying magnetic fields, produce currents and viceversa.