0
$\begingroup$

I have the field: $$\bar a(\bar r)=r \bar c + \frac{(\bar c\cdot \bar r)}{r}\bar r$$ where $$\bar c $$ is a constant vector.

I have worked through the problem and I cant seem to easily show that: $$ \bar \nabla \times \bar a (\bar r ) = 0 $$

I get instead $$-(\hat r\times\bar c)$$. Any help would be most appreciated!

$\endgroup$
0
$\begingroup$

Hint: compute $\mathrm{div}(a(\bar r))$ and show it is not zero.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.