What fundamental principle did Michael Faraday demonstrate on August 29, 1831?
Answer
The principle of mutual induction
On August 29, 1831, Faraday successfully demonstrated mutual induction using an apparatus consisting of two separate coils wrapped around an iron ring. He observed that closing or breaking the electrical circuit in the primary coil caused a transient current to flow in the secondary coil, proving that a changing magnetic field in one circuit could induce an electric current in another entirely separate circuit without physical contact.
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