Use Stokes' Theorem for the vector field c x r, where c is an arbitrary constant vector, to deduce that equals the vector area of any open surface bounded by the closed curve C, with the directions of dS and C related by a right-hand rule.
Use Stokes' Theorem for the vector field c x r, where c is an arbitrary constant vector, to deduce that equals the vector area of any open surface bounded by the closed curve C, with the directions of dS and C related by a right-hand rule.