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# A condenser of $100\; \mu F$ is charged to $50 V$. What is its energy in Joules?

$(a)\;1.25J\qquad(b)\;0.125 J\qquad(c)\;12.5J\qquad(d)\;0.0125J$

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• Energy stored in a charged capacitor $E = \large\frac{1}{2} $$CV^2 Given C = 100 \;\mu F and V = 50V, E = \large\frac{1}{2}$$CV^2$$= \large\frac{1}{2}$$ \times 100 \times 10^{-6} \times 50^2 = 0.125$ J

edited Jul 29, 2014