The principle of transformer is _____?
ٹرانسفارمر کا اصول _____ ہے؟
Explanation
A transformer works on the principle of mutual induction, where a changing current in the primary coil induces a voltage in the secondary coil.This is based on Faraday's Law of Electromagnetic Induction, which states that a changing magnetic field produces an electromotive force (emf).