A wire of length 1.5 m and diameter 0.3 mm has resistance 12 Ω. Its resistivity is:

  1. 5.65 10^-6 Ω m
  2. 5.65 10^-7 Ω m
  3. 1.41 10^-7 Ω m
  4. 2.26 10^-6 Ω m
Answer

B) 5.65 10^-7 Ω m

A = pi r^2 = 7.07 10^-8 m^2; rho = RAL = 5.65 10^-7 Ω m. SLO P-09-E-13 · Application

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