Learn more: http://www.khanacademy.org/video?v=99pD1-6ZpuM
Showing that the line integral of a scalar field is independent of path direction

Length: 15 minutes

Vector Field Line Integrals Dependent on Path Direction

Length: 17 minutes

Path Independence for Line Integrals

Length: 8 minutes

Closed Curve Line Integrals of Conservative Vector Fields