( integral form ) , where H is the magnetic H field ( also called `` auxiliary magnetic field '' , `` magnetic field intensity '' , or just `` magnetic field '' ) , D is the electric displacement field , and Jf is the enclosed conduction current or free current density .
( integral form ) , where H is the magnetic H field ( also called `` auxiliary magnetic field '' , `` magnetic field intensity '' , or just `` magnetic field '' , D is the electric displacement field , and Jf is the enclosed conduction current or free current density .