Polystyrene has dielectric constant 2.6 and dielectric
Chapter 24, Problem 24.4(choose chapter or problem)
Polystyrene has dielectric constant 2.6 and dielectric strength 2.0 * 107 V>m. A piece of polystyrene is used as a dielectric in a parallel-plate capacitor, filling the volume between the plates. (a) When the electric field between the plates is 80% of the dielectric strength, what is the energy density of the stored energy? (b) When the capacitor is connected to a battery with voltage 500.0 V, the electric field between the plates is 80% of the dielectric strength. What is the area of each plate if the capacitor stores 0.200 mJ of energy under these conditions?
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