Lenz’s Law: The Rule That Opposes Change

Lenz’s Law states that induced currents always oppose the change that caused them.
Push a magnet into a coil, and the coil creates a field that pushes back.
This opposition is nature’s way of conserving energy.
Without Lenz’s Law, you could get energy from nothing—violating physics.
It explains why moving a magnet through a coil feels like resistance.
The induced current’s direction is always such that it fights the original motion.
Magnetic braking in roller coasters and trains relies on Lenz’s Law.
It’s the reason dropping a magnet through a copper tube slows it dramatically.
Lenz’s Law is a key extension of Faraday’s Law of electromagnetic induction.
From power plants to theme parks, this “rule of opposition” is at work everywhere.