The Collaborative International Dictionary of English v.0.48:

Positively \Pos"i*tive*ly\, adv.
   In a positive manner; absolutely; really; expressly; with
   certainty; indubitably; peremptorily; dogmatically; --
   opposed to negatively.
   [1913 Webster]

         Good and evil which is removed may be esteemed good or
         evil comparatively, and positively simply. --Bacon.
   [1913 Webster]

         Give me some breath, some little pause, my lord,
         Before I positively speak herein.        --Shak.
   [1913 Webster]

         I would ask . . . whether . . . the divine law does not
         positively require humility and meekness. --Sprat.
   [1913 Webster]

   Positively charged or Positively electrified (Elec.),
      having a charge of positive electricity; -- opposed to
      negatively charged.
      [1913 Webster]

WordNet (r) 3.0 (2006):

positively charged
    adj 1: having a positive charge; "protons are positive" [syn:
           positive, electropositive, positively charged]