A parallel-plate capacitor, having plates 100 cm area, has dielectrics 1 mm each and of permittivities 3, 4 and 6. If a peak voltage of

• A parallel-plate capacitor, having plates 100 cm² area, has dielectrics 1 mm each and of permittivities 3, 4 and 6. If a peak voltage of 2,000 V is applied to the plates, calculate (a) potential gradient across each dielectric (b) energy stored in each dielectric.