Answer: Faraday.
- A Maxwell
- B Faraday
- C Ampere
- D Oersted
Correct answer: B. Faraday
Explanation: Michael Faraday discovered electromagnetic induction in 1831, showing that changing magnetic flux induces EMF.
As a magnet approaches a coil, flux rises steadily and a constant non-zero EMF is induced (Faraday's law). Once the magnet stops moving, flux stays constant and the induced EMF drops to zero - EMF only exists while flux is actively changing.
Concept context
Faraday's and Lenz's laws, motional EMF, self/mutual inductance, eddy currents, and the AC generator - how a changing magnetic flux creates an electric current.