question_answer 43)

  Sea water at frequency v = 4 x 108 Hz has permittivity  permeability  and resistivity Imagine a parallel plate capacitor immersed m sea water and driven by an alternating voltage source V (t) = V0 sin (2  vt). What fraction of the conduction current density is the displacement current density ?

Answer:

                  Let d be the distance between the plates. The applied voltage is given by, V (t) = V0 sin 2 vt. The applied electric field, The conduction current density,  where=max. conduction current density. Displacement current density is given by Where =max. displacement current density