A capacitor is hooked up to a resistor and an AC voltage source as shown in the figure. The output of the source is given by V(t) = V₀ sin ωt. The plates of the capacitor are disks of radius R. Point P is directly between the two plates, equidistant from them and a distance R/2 from the center axis. At point P A) there is no magnetic field because there is no charge moving between the plates. B) there is a constant magnetic field. C) there is a time-varying magnetic field.

Question

Quizplus · Accepted Answer

Since the voltage source is AC, there is a time-varying electric field between the capacitor plates. This time-varying electric field creates a time-varying magnetic field according to Maxwell's equations. Therefore, at point P, there is a time-varying magnetic field.

A Capacitor Is Hooked Up to a Resistor and an AC