Consider Two Copper Wires of Equal Cross-Sectional Area

question 527

Multiple Choice

Consider two copper wires of equal cross-sectional area. One wire has 3 times the length of the other. How do the resistivities of these two wires compare?

• A) The longer wire has 27 times times the resistivity of the shorter wire.
• B) The longer wire has 9 times times the resistivity of the shorter wire.
• C) The longer wire has 3 times the resistivity of the shorter wire.
• D) Both wires have the same resistivity.

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