Faraday's Electromagnetic Induction

About This Experiment

Faraday's law states that induced EMF equals the negative rate of change of magnetic flux: EMF = −N dΦ/dt. When a magnet moves through a coil, the changing magnetic flux induces an EMF that opposes the change (Lenz's law). The faster the change or the more turns in the coil, the greater the induced EMF.

This principle is fundamental to generators, transformers, and induction motors. The negative sign in Faraday's law represents Lenz's law - the induced current creates a magnetic field that opposes the change causing it, demonstrating conservation of energy.