A wire (length = 2 m, diameter = 1 mm) has a resistance of 0.45 Ω. What is the resistivity of the material used to make the wire? A. 2.3 x 10^-7 Ω.m B. 5.6 x 10^-7 Ω.m C. 1.8 x 10^-7 Ω.m D. 1.2 x 10^-7 Ω.m
Added by Robert H.
Step 1
Given diameter = 1 mm Radius, r = diameter / 2 = 1 mm / 2 = 0.5 mm = 0.5 x 10^-3 m = 5 x 10^-4 m Show more…
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