# Problem related to electric and magnetic energy densities

1. Mar 26, 2008

### Elisa A

1. The problem statement, all variables and given/known data

How can be shown that the electric energy density is completely dominated by the magnetic energy density for non-relativistic plasmas?

2. Relevant equations

the electric energy density is given by $${\epsilon_{0}.E^{2}}{}$$, and the magnetic energy density is given by $$\frac{B^{2}}{2\mu_{0}}$$

3. The attempt at a solution

To relate the magnitude of the two fields it should be used one of the Maxwell's eqs, i.e.:
$$\nabla$$$$\times\vec{E}$$ = -$$\frac{d\vec{B}}{dt}$$

But this is all I can do so far...
Please , help me with a hint how to use the given ..

2. Mar 27, 2008

### stanchov

3. Mar 28, 2008

### Elisa A

thank you :)

Thank you for the help :)

Kisses,
Elisa