# Lenz's Law

Written by Jerry Ratzlaff on . Posted in Electromagnetism

Lenz's law, abbreviated as $$\epsilon$$, is the direction of the current induced in a conductor by changing magnetic field.

## Lenz's Law formula

 $$\large{ \epsilon = -N \; \frac{ \partial \Phi_B }{ \partial t } }$$

### Where:

$$\large{ \epsilon }$$  (Greek symbol epsilon) = induced EMF

$$\large{ \partial \Phi_B }$$ = change in magnetic flux

$$\large{ \partial t }$$ = change in time

$$\large{ N }$$ = number of turns in coil