Question: A long copper rod with a resistivity, = 1 . 7 2 x 1 0 - 8 m , and a circular cross - section

A long copper rod with a resistivity, =1.72 x 10-8m, and a circular cross-section is being used to carry current between two electrodes. The diameter of the cross-section is measured n =6 times to have an average value, d =1.7 cm, with a standard deviation, d 0.045 cm.

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