Nine Identical Wires, Each of Diameter D and Length L

question 26

Multiple Choice

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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Definitions:

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