(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Ok well all im told in the question is that the magnetic fieldBat a distance r from a straight wire carrying current I has magnitude uoI/2pi r..

The lines of force are circles on the wire and in planes perpendicular to it..

Show that divB= 0

2. Relevant equations

3. The attempt at a solution

So I've not actually done any electromag, but it should be possible to do the question without it...

Im just unsure on how to write the vectorB..i.e. how can i write it down in vector form using the information theyve given me?

thanks :)

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# Divergence of magnetic field

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