P28_033 - 33. (a) We note that the R1 resistors occur in...

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33. (a) We note that the R 1 resistors occur in series pairs, contributing net resistance 2 R 1 in each branch where they appear. Since E 2 = E 3 and R 2 =2 R 1 , from symmetry we know that the currents through E 2 and E 3 are the same: i 2 = i 3 = i . Therefore, the current through E 1 is i 1 =2 i .Th en from V b V a = E 2 iR 2 = E 1 + (2 R 1 )(2 i )weget i = E 2 −E 1 4 R 1 + R 2 = 4 . 0V 2 . 0V 4(1 .
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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