- #1

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Part of a problem I've been set is to show that the equation:

**B**(

**r**) = [tex]\frac{1}{2}\mu_0[/tex] (

**J**x

**r**)

from Ampere's law:

**[tex]\nabla[/tex]**x

**B**= [tex]\mu_0[/tex]

**J**.

The problem presents no... uh... problem thereafter, but I'm at a loss where to begin. I've been playing around with random vector identities for a while but I'm rubbish at remembering these things, my notes are in mayhem and my textbooks aren't helping. If I could get a hint where to start, that would be great.

Oh, and this is for tomorrow, so quite urgent.

Cheers,

El Hombre