The energy stored in a charged capacitor of capa city 25 µF is 4J. Fi

1.	The energy stored in a charged capacitor of capa city 25 µF is 4J. Find the charge on its plate.
Answer» Data: C = 25 pF = 25 × 10^-12 F, U = 4 J U = \(\cfrac12\)\(\cfrac{Q^2}C\) ∴ The charge, Q = \(\sqrt{2UC}\) = \(\sqrt{2\times4\times25\times10^{-12}}\) = 1.414 x 10^-5 C (= 14.14 µC)

The energy stored in a charged capacitor of capa city 25 µF is 4J. Find the charge on its plate.

Answer»

Data: C = 25 pF = 25 × 10^-12 F, U = 4 J

U = \(\cfrac12\)\(\cfrac{Q^2}C\)

∴ The charge, Q = \(\sqrt{2UC}\)

= \(\sqrt{2\times4\times25\times10^{-12}}\)

= 1.414 x 10^-5 C (= 14.14 µC)

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The energy stored in a charged capacitor of capa city 25 µF is 4J. Find the charge on its plate.

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