A parallel plate capacitor with radius 21 cm is connected in series with a 15-V battery.A switch is thrown which causes the capacitor to discharge through a 150-$\varOmega$ resistor.What is the displacement current between the plates at this time?

Question

Quizplus · Accepted Answer

The displacement current between the plates can be found using the formula for the current in an RC circuit during discharge, $I = \frac{V}{R}$, where $V$ is the voltage across the capacitor and $R$ is the resistance. Here, $V = 15\,V$ and $R = 150\,\Omega$, so $I = \frac{15\,V}{150\,\Omega} = 0.1\,A$. The separation of the plates is not needed to calculate the displacement current in this context.

A Parallel Plate Capacitor with Radius 21 Cm Is Connected Ω\varOmegaΩ

A Parallel Plate Capacitor with Radius 21 Cm Is Connected $\varOmega$