Physics (10th Edition)

Published by Wiley
ISBN 10: 1118486897
ISBN 13: 978-1-11848-689-4

Chapter 20 - Electric Circuits - Problems - Page 573: 8



Work Step by Step

$Energy=\frac{Energy}{Charge}\times Charge$ But $\frac{Energy}{Charge}=V$ and $Charge\,q=It=\frac{V}{R}t$ Therefore, $Energy= Vq=V\times\frac{V}{R}t=\frac{V^{2}\times t}{R}$ Substituting the values, we get Energy delivered $=\frac{(120\,V)^{2}\times60\,s}{14\,\Omega}=6.2\times10^{4}\,J$
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