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Sticky Note
The principle of transformer is _____?
ٹرانسفارمر کا اصول _____ ہے؟
  1. Mutual induction
  2. Ampere's law
  3. Motional e.m.f
  4. None of these
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).

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