# hw5 - Problem 7 The energy stored in a capacitor is Q2...

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Problem 7. The energy stored in a capacitor is U = Q 2 2 C = C V ) 2 2 . 1. U = 36 · 1 2 = 18 J . 2. U = 10 - 4 · 9 · 10 4 2 = 4 . 5 J . 3. C = ± 0 A d = 8 . 85 · 10 - 12 · 10 6 10 3 = 8 . 85 · 10 - 9 F; U = 8 . 85 · 10 - 9 · 10 16 2 = 4 . 4 · 10 7 J. The electric energy in the cloud is approximately equal to energy in 2,400,000 capacitors in
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## This note was uploaded on 04/05/2010 for the course PHYS 1304 taught by Professor Staff during the Fall '08 term at Southern Methodist.

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hw5 - Problem 7 The energy stored in a capacitor is Q2...

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