DC Series-Parallel Worksheet

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gadget142

Joined Mar 9, 2012
1
Hi! Can someone explain to me how to solve Figure 6 on Question 5 on this page? As far as I can tell, the problem does not easily break down into parallel or series components. The answer is given but I am at a loss to see how it was arrived at. I don't even know whether the current travels left or right across the bridge.
http://www.allaboutcircuits.com/worksheets/dc_sp.html
Thank you!
 
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