PHYSICS · Subjective · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Capacitor X has plate area 2A, plate separation d, and contains a dielectric with constant κ=2. Capacitor Y has plate area A, plate separation 2d, and contains vacuum. Both capacitors are connected individually to identical batteries that supply the same potential difference. Which capacitor stores more energy, and by what factor compared with the other?