56. The currents in Rand RVare iand i' – i, respectively. Since V = iR = (i' – i)RVwe have, by dividing both sides by V, 1 = (i' /V – i/V)RV= (1/R' – 1/R)RV. Thus, 111'.VVVRRRRRR=−⇒=′+The equivalent resistance of the circuit is eq00'VAAVRRRRRRRR=++=+++. (a) The ammeter reading is ()()()eq0212.0V3.0010030085.030085.07.09 10 A.AVViRRRRRεε−′===+++Ω+Ω+ΩΩΩ+Ω=×(b) The voltmeter reading is
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