Because the curl of →H in Ampere’s law equals the sum of current density →J and ∂→D/∂t, the derivative \(\partial \overrightarro...Because the curl of →H in Ampere’s law equals the sum of current density →J and ∂→D/∂t, the derivative ∂→D/∂t is often called the displacement current density because the units are the same, A/m 2 . For the capacitor of Figure 3.3.1 the curl of →H near the feed wires is associated only with →J (or I), whereas between the capacitor plates the curl of \(\…
