we have 00000ooooooooc0000o H·d=)I 88888888888888 which is Ampere's law for the magnetic intensity H: The line integral of H around a closed path is equal to only sum of the conduction currents across any surface bounded(形成的…边界)by the path H  l = I   d we have which is Ampere’s law for the magnetic intensity : H  The line integral of around a closed path is equal to only sum of the conduction currents across any surface bounded(形成的…边界） by the path. H  • P  B  0 I