ملف:Lenz law demonstration.png

English: Lenz's law tells the direction of a current in a conductor loop induced indirectly by the change in magnetic flux through the loop. Scenarios a, b, c, d and e are possible. Scenario f is impossible due to the law of conservation of energy (energy can not be destroyed or created). The charges (electrons) in the conductor are not pushed in motion directly by the change in flux, but by a perpendicular circular electric field (not pictured) which directs a force to the electrons. This electric field surrounds the total magnetic field of inducing and induced magnetic fields. Changing total magnetic field induces the electric field. It is worth noting that electrons always move to the opposite than current I does.