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The plates of a parallel plate capacitor...

The plates of a parallel plate capacitor have an area of ` 100 cm^(2)` each and are separated by 3 mm . The capacitor is charged by connecting it to a 400 V supply .
Calculate the electrostatic energy stored in the capacitor .

Text Solution

Verified by Experts

Given ` A = 100 cm^(2) = 10^(2) xx 10^(-4) = 10^(-2) m^(2)`
d = 3 mm = ` 3xx 10^(-3) m`,
V = 400 V
Electrical energy .E. `= 1/2 CV^(2) = (in _(0) AV^(2))/(2d) `
i.e., ` E = (8.854 xx 10^(-12) xx 10^(-2) xx (400)^(2))/(3 xx 10^(-3)) `
i.e., ` E = 2.361 xx 10^(-6) J`
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