A wire of resistivity ρ must be replaced in a circuit by a wire of the same material but 4 times as long.

A wire of resistivity ρ must be replaced in a circuit by a wire of the same material but 4 times as long. If, however, the resistance of the new wire is to be the same as the resistance of the original wire, how does the diameter of the new wire change?

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genius_generous answered 2 years ago

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