ch26_p22 - 22. The cross-sectional area is A = r2 = (0.002...

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22. The cross-sectional area is A = π r 2 = π (0.002 m) 2 . The resistivity from Table 26-1 is ρ = 1.69 × 10 8 ·m. Thus, with L = 3 m, Ohm’s Law leads to
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