Again, sorry for the naff title.
Find $\displaystyle \nabla\times(r\mathbf{r})$, where $\displaystyle r=|\mathbf{r}|$ and $\displaystyle \mathbf{r}=(x,y,z)$.
I ended up with an answer of $\displaystyle (0,0,0)$, which, again, I doubt is right.
Again, sorry for the naff title.
Find $\displaystyle \nabla\times(r\mathbf{r})$, where $\displaystyle r=|\mathbf{r}|$ and $\displaystyle \mathbf{r}=(x,y,z)$.
I ended up with an answer of $\displaystyle (0,0,0)$, which, again, I doubt is right.