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100. (a) From symmetry we see that the current through the top set of batteries (
i
) is the
same as the current through the second set. This implies that the current through the
R
=
4.0
Ω
resistor at the bottom is
i
R
= 2
i
. Thus, with
r
denoting the internal resistance of each
battery (equal to 4.0
Ω
) and
ε
denoting the 20 V emf, we consider one loop equation (the
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.
 Spring '08
 Any
 Physics, Current

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