Nine identical wires, each of diameter d and length L, are connected in series.The combination has the same resistance as a single similar wire of length L but whose diameter is:
A)9d
B)3d
C)d/3
D)d/9
E)d/81

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The Answer of Nine identical wires, each of diameter d and length L, are connected in series.The combination has the same resistance as a single similar wire of length L but whose diameter is:
A)9d
B)3d
C)d/3
D)d/9
E)d/81

Nine Identical Wires, Each of Diameter D and Length L