A dielectric slab is slowly inserted between the plates of a parallel plate capacitor, while the potential difference between the plates is held constant by a battery. As it is being inserted:
A) the capacitance, the potential difference between the plates, and the charge on the positive plate all increase
B) the capacitance, the potential difference between the plates, the charge on the positive plate all decrease
C) the potential difference between the plates increases, the charge on the positive plate decreases, and the capacitance remains the same
D) the capacitance and the charge on the positive plate decrease but the potential difference between the plates remains the same
E) the capacitance and the charge on the plate increase but the potential difference between the plates remains the same

Question

Quizplus · Accepted Answer

When a dielectric is inserted, the capacitance increases. Since the potential difference is held constant by the battery, the charge on the plates must increase to maintain the same voltage.

A Dielectric Slab Is Slowly Inserted Between the Plates of a Parallel