- #1
jesuslovesu
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Homework Statement
http://img2.freeimagehosting.net/uploads/bf073a5eb1.png
http://img2.freeimagehosting.net/uploads/bf073a5eb1.png
Determine the variable resistance R if the 25 Watts to be absorbed by the battery (0.035 ohm resistor and the 10.5 V element).
Homework Equations
V = IR
P = IV
The Attempt at a Solution
Well I did KVL clockwise current flow
-13 + 0.02*i + iR + 0.035*i + 10.5 = 0
2.5 = 0.02i + 0.035i + iR
Then factoring in 25W=10.5*i
i = 2.381 A which is close to the answer but doesn't factor in 0.035 and I'm not sure how to do it
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