Each plate of an air-filled parallel-plate air capacitor has an area of 0.0040 m2, and the separation of the plates is 0.080 mm. an electric field of 5.3 × 106 v/m is present between the plates. what is the energy density between the plates? (ε0 = 8.85 × 10-12 c2/n · m2)

124.3 J/m^3

Explanation:

The energy density between the plates of a parallel-plate capacitor is given by

where

ε0 = 8.85 × 10-12 C2/N · m2 is the vacuum permittivity

E is the electric field strength

In this problem,

E = 5.3 × 106 V/m

So the energy density is

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