Calculate the resistivity of a wire of length 2m and cross-sectional area 0.004cm2 if the resistance is 3.0 Ω.
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Correct Answer: Option B
Explanation:
R = αL/A
P = RA/L = (3 x 0.004)/2 = 0.006
R = αL/A
P = RA/L = (3 x 0.004)/2 = 0.006