# Ohmic power loss due to electric field

Recently I read in the basic EM theory course , that the Ohmic power dissipated in a conductor is directly proportional to the conductivity and the square of the electric field intensity , but we know perfect conductors (conductivity=inf) dissipate zero power , isn't this contradictory , also formula is given on Page 391 , Alexander Sadiku ,EM Theory , thanks.

• Didn't you think that including the formula you're asking about in your question would make sense? – Dmitry Grigoryev Aug 16 '18 at 13:09