A parallel-plate capacitor has two dielectric layers as shown. If it is connected across a battery, the ratio of the potential differences across the two dielectric layers is:

Question

G1 Physics · Accepted Answer

For dielectric layers in series along the field, the same free charge flows and Vᵢ ∝ dᵢ/Kᵢ. Using the shown thicknesses and dielectric constants gives V₁/V₂ = 3/2. Hence D.