Question

If anyone says that curl of vector is zero, what does it mean?

Answer 1

It has something to do with rotation and 3d vector field :)

Answer 2

I didn't got you!!!

Answer 3

it means everything below :-
1) rotation component = 0
2) the field is conservative
3) the field is a gradient of some potential

Answer 4

Thank you ganeshie8,

Answer 5

np :)

if u have time, just watch 2 minutes of this:
http://ocw.mit.edu/courses/mathematics/18-02-multivariable-calculus-fall-2007/video-lectures/lecture-21-gradient-fields/

watch the video between 38:30 and 40:00

Answer 6

Thanks a lot...