What was faradays law?

Faraday's law of electromagnetic induction states that a changing magnetic field within a closed loop induces an electromotive force (EMF) in the loop. Specifically, the induced EMF is proportional to the rate of change of the magnetic flux through the loop. This principle underlies many electrical technologies, including generators and Transformers, and is fundamental to the operation of electrical circuits. Faraday's law is mathematically expressed as EMF = -dΦ/dt, where Φ represents the magnetic flux.