Question

What are Faraday’s laws of electromagnetic induction?

Answer 1

1. First law: An emf is induced in a circuit whenever the magnetic flux linked with it changes. If the circuit is closed, an induced current flows.
2. Second law: The magnitude of the induced emf is proportional to the rate of change of magnetic flux linked with the circuit. For a coil of (N) turns: \[\mathcal{E}=-N\frac{d\Phi_B}{dt}\] The minus sign represents Lenz’s law: the induced emf opposes the change in flux.