Lenz’s law

That current creates its own magnetic field. Its direction is such that it opposes the change in the field through the coil, rather than necessarily opposing the magnet’s field at all times. This is Lenz’s law.

This opposition is described by Lenz's law. Suppose the north pole of a magnet is pushed towards a coil. The magnetic field through the coil increases, so the induced current produces a field that resists that increase.

The direction of the current is such that this second field opposes the original change that caused the induction. This is known as Lenz's law.