What is the working principle of a transformer based on?
A
Electrostatic induction
B
Mechanical induction
C
Thermal conduction
D
Electromagnetic induction
Correct Answer: Option D — Electromagnetic induction
Explanation:
A transformer works on the principle of electromagnetic induction, discovered by Michael Faraday. It uses a changing magnetic field created by alternating current in the primary coil to induce a voltage in the secondary coil, enabling voltage transformation.