# Trying to simplify a permeability expression

1. Jun 4, 2006

### NEWO

I'm just looking through some work I did a while back and trying to simplify an expression,

epsilon_{0}epsilon_{r}=epsilon

is there an expression for

mu_{0}mu_{r}?

2. Jun 4, 2006

### Hootenanny

Staff Emeritus
The relative permeability is defined as

$$\mu_{r} = \frac{\mu}{\mu_{0}} \Leftrightarrow \mu = \mu_{0}\cdot\mu_{r}$$

3. Jun 4, 2006

cool cheers