Magnetic flux in this case is given by Φ=∫SB⋅ds where B is the magnetic flux density (units of T = Wb/m2), S is the su...Magnetic flux in this case is given by Φ=∫SB⋅ds where B is the magnetic flux density (units of T = Wb/m2), S is the surface bounded by a single current loop, and ds points in the direction determined by the right hand rule with respect to the direction of positive current flow.