S-Cool Revision Summary

S-Cool Revision Summary

This is a 'stroppy' law. Basically, it rebels against everything!

Lenz's Law can be described as:

The emf is induced in a direction which opposes whatever causes the induction.

If you roll a metal bar into a magnetic field it will slow and stop due to the force opposing its motion (the force that Lenz says will be set up).

Where does all the kinetic energy of the bar go?

Well in fact, the Ek is transformed into electrical energy.

So this is the source of the emf, transferred from other energy into electrical energy.