Question

Can anyone explain Lenz' Law?

Answer 1

Lenz's law states that the induced current flows in a direction such that it opposes the change producing it

Answer 2

Lenz's law used to give the direction of the induced electromotive force (emf) and current resulting from electromagnetic induction. Heinrich Lenz postulated in 1834 the following law;

"An induced current is always in such a direction as to oppose the motion or change causing it"

The law provides a physical interpretation of the choice of sign in Faraday's law of induction, indicating that the induced emf and the change in flux have opposite signs