Lenz's Law

Lenz's Law states that an induced electrical current in a conductor will always oppose the change in magnetic flux that created it. In simpler terms, when a magnetic field nearby changes, it causes electricity to flow in a conductor. The direction of this induced current always acts to resist the original change in magnetic flux, following the conservation of energy. For example, if you move a magnet toward a coil, the coil produces a current that opposes the magnet’s movement. This law helps explain how electric generators and transformers work.