# Gradient, divergence and curl - nabla crossed with |r|r

• November 29th 2009, 11:49 AM
chella182
Gradient, divergence and curl - nabla crossed with |r|r
Again, sorry for the naff title.

Find $\nabla\times(r\mathbf{r})$, where $r=|\mathbf{r}|$ and $\mathbf{r}=(x,y,z)$.

I ended up with an answer of $(0,0,0)$, which, again, I doubt is right.
• December 1st 2009, 09:54 PM
qmech
You're right. A radial field has no curl.
• December 2nd 2009, 02:48 AM
chella182
Cheers. Yeah, like I said in my other thread, turns out I was doing all of this shizz right when I thought I was doing it wrong :p