Hva er energi lagret i kondensator?
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U=12CV2=Q22C=12QV\displaystyle U = \frac{1}{2}CV^2 = \frac{Q^2}{2C} = \frac{1}{2}QVU=21CV2=2CQ2=21QV. For platekondensator: u=12ϵ0E2\displaystyle u = \frac{1}{2}\epsilon_0 E^2u=21ϵ0E2.
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