Question

what conversion takes place in a generator?
a. an electric current into a magnetic field
b. a lower voltage into a higher voltage
c. electric energy into mechanical energy
d. mechanical energy into electric energy

Explanation:

A generator operates based on electromagnetic induction. When a conductor moves in a magnetic field (mechanical energy input), an electromotive force (emf) is induced in the conductor, resulting in the generation of electric current (electric energy output).

• Option A: A magnetic field is used in the process of a generator, but the main conversion is not from electric current to magnetic field.
• Option B: Transformer changes voltage levels (step - up or step - down), not a generator.
• Option C: This is the conversion in a motor (electric energy to mechanical energy).
• Option D: Correct as per the principle of electromagnetic induction in a generator.

Answer:

D. Mechanical energy into electric energy