A rod (length = 80 cm) with a rectangular cross section (1.5 mm × 2.0 mm) has a resistance of 0.20 W. What is the resistivity of the material used to make the rod?
a. 6.0 × 10^-7 W × m
b. 3.8 × 10^-7 W × m
c. 7.5 × 10^-7 W × m
d. 3.0 × 10^-7 W × m
e. 4.8 × 10^-7 W × m
C
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