▁object . ▁This ▁energy ▁will ▁generally ▁be ▁non - zero ▁if ▁there ▁is ▁another ▁elect r ically ▁charged ▁object ▁nearby . ▁ ▁The ▁work ▁W ▁required ▁to ▁move ▁q ▁from ▁A ▁to ▁any ▁point ▁B ▁in ▁the ▁electro static ▁force ▁field ▁is ▁given ▁by ▁ ▁typically ▁given ▁in ▁J ▁for ▁J ou les . ▁A ▁related ▁quantity ▁called ▁electric ▁potential ▁( comm only ▁denoted ▁with ▁a ▁V ▁for ▁voltage ) ▁is ▁equal ▁to ▁the ▁electric ▁potential ▁energy ▁per ▁unit ▁charge . ▁ ▁Mag net ic ▁potential ▁energy ▁The ▁energy ▁of ▁a ▁magnetic ▁moment ▁ ▁in ▁an ▁extern ally ▁produced ▁magnetic ▁B - field ▁ ▁has ▁potential ▁energy ▁▁▁▁ ▁The ▁magnet ization ▁ ▁in ▁a ▁field ▁is ▁ ▁where ▁the ▁integral ▁can ▁be ▁over ▁all ▁space ▁or , ▁equival ently , ▁where ▁ ▁is ▁non zero . ▁Mag net ic ▁potential ▁energy ▁is ▁the ▁form ▁of ▁energy ▁related ▁not ▁only ▁to ▁the ▁distance ▁between ▁magnetic ▁materials , ▁but ▁also ▁to ▁the ▁orientation , ▁or ▁alignment , ▁of ▁those ▁materials ▁within ▁the ▁field . ▁For ▁example , ▁the ▁need le ▁of ▁a ▁comp ass ▁has ▁the ▁lowest ▁magnetic ▁potential ▁energy ▁when ▁it ▁is ▁aligned ▁with ▁the ▁north ▁and ▁south ▁pol es ▁of ▁the ▁Earth ' s ▁magnetic ▁field . ▁If ▁the ▁need le ▁is ▁moved ▁by ▁an ▁outside ▁force , ▁tor que ▁is ▁ex ert ed ▁on ▁the ▁magnetic ▁di pole ▁of ▁the ▁need le ▁by ▁the ▁Earth ' s ▁magnetic ▁field , ▁causing ▁it ▁to ▁move ▁back ▁into ▁alignment . ▁The ▁magnetic ▁potential ▁energy