1. The problem statement, all variables and given/known data Given a vector field F=-y/(x^2+y^2) i +x/(x^2 +y^2) Calculate the curl of it the line integral of it in a unit circle centered at O 2. Relevant equations 3. The attempt at a solution I calculated that the curl is 0 but the line integral is 2π. I don't think this field should have a zero curl as you can imagine that the field is rotating.