The displacement current density is:

$2$ cos$($t $5$z$)$axA$/$m$2$

in a material for which $=0,=4$o$,$ and $=5$o$.$

a$)$ Use the definition of displacement current density to find ~D and ~E$.$

b$)$ Now use the point form of Faraday$$s law and time integrations to find ~B and ~H$.$

c$)$ Finally, use the point form of Ampere$$s circuital law to find the displacement

current density. What must be