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A current of 2 A. flows in an electric circuit as shown in figure. The potential difference $(V_R-V_s)$, in volts ($V_R$ and $V_s$ are potentials at R and S respectively ) is

$ (1) -4 //(2) +2 // (3) +4 // (4) -2
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(3) +4
answered Nov 7, 2013 by pady_1

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