Consider Two Copper Wires with Circular Cross-Sections and Equal Lengths $\sqrt { 3 }$

Consider two copper wires with circular cross-sections and equal lengths.One wire has 3 times the diameter of the other.How do the resistances of these two wires compare?

A) The thicker wire has 1/3 the resistance of the thinner wire.
B) The thicker wire has 1/9 the resistance of the thinner wire.
C) The thicker wire has 3 times the resistance of the thinner wire.
D) The thicker wire has 9 times the resistance of the thinner wire.
E) The thicker wire has $\sqrt { 3 }$ times the resistance of the thinner wire.

Correct Answer:

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