P28_002.PDF

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Chapter 28 - 28.2
2. The chemical energy of the battery is reduced by ∆ E = q
E
,where q is the charge that passes through in
time ∆ t =6 . 0min,and
E
is the emf of the battery. If i is the current, then q = i ∆ t and ∆ E = i
E
∆ t =
(5 . 0A)(6 . 0V)(6 . 0min)(60s / min) = 1 . 1
×
10 4 J. We note the conversion of time from minutes to seconds.

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