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dennie
 Post subject: capacitor questio no.5
PostPosted: Mon, 3 Dec 2007 13:42:40 UTC 
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Joined: Sun, 7 Oct 2007 02:52:57 UTC
Posts: 29
A portable compact disk player is designed to play for 2.0 hours on a fully charged battery pack. If the battery pack provides a total of 180 C of charge, how much current does the player use in operating?
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thelostchild
 Post subject:
PostPosted: Thu, 6 Dec 2007 01:23:35 UTC 
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Joined: Sun, 28 Jan 2007 14:32:18 UTC
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$\begin{array}{l} {\rm{Using }}I = \frac{Q}{t} \\ {\rm{We have:}} \\ Q = 180C \\ t = 2h = 7200s \\ {\rm{Therefore: - }} \\ {\rm{I = }}\frac{{{\rm{180C}}}}{{{\rm{7200s}}}} = 0.025A \\ \end{array}$
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