Question

Briefly explain how and where the displacement current exists during the charging of a capacitor.

Answer 1

Capacitor Charging and Displacement Current:
During capacitor charging, conduction current flows in the wires to the plates. Within the dielectric gap between the plates, while no conduction current is present, the electric field varies over time.
To ensure current continuity, Maxwell proposed the concept of displacement current, which is found between the capacitor plates and defined as:
\[ I_d = \varepsilon_0 \frac{d\Phi_E}{dt} \] where \( \Phi_E \) represents electric flux.
Consequently, displacement current is present in the dielectric between the capacitor plates during charging and is numerically equal to the conduction current in the circuit.