Question

Derivation of displacement current.

Answer 1

Answer:

The flux is only has a nonzero part where there is a nonzero electric field. Next if we assume the σσ is the charge density on the plate, then when you replace the EE integral with a σσ integral then the area there is just over the area of the capacitor CC because that is where the electric field is nonzero, and equals σ/ϵ0.σ/ϵ0.

ΦE=∫SE⋅n^da=∫Cσϵ0da

Answer 2

In Pics

displacement current is equal to rate of change of electric flux with respect to time