The resistance of a 5m uniform wire of cross-sectional area 0.2 x 10-6m2 is 0.425. What is the resistivity of the material of the wire?
Resistance = \(\frac{\text{ Resistivity x Area}}{Area}\) = 0.425 x 0.2 x 10-6 = 1.7 x 10-8\(\Omega\)m
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