Step 1: Understanding the Concept:
An electric generator operates on the principle of electromagnetic induction.
Step 2: Detailed Explanation:
In a generator, a coil is physically rotated inside a magnetic field using some external mechanical force (like a turbine driven by water or steam).
This mechanical rotation changes the magnetic flux linked with the coil, inducing an electromotive force (EMF) and generating an electric current.
Therefore, the input is physical motion, and the output is electricity.
Step 3: Final Answer:
Mechanical energy is converted into electrical energy.