If a Mile of 24-Gauge Copper Wire Has a Resistance

Multiple Choice

If a mile of 24-gauge copper wire has a resistance of 0.14 kΩ and the resistivity of copper is 1.7 × 10−⁸ Ω ⋅ m, what is the diameter of the wire? (1 mile = 1.6 km)

A) 0.40 mm
B) 0.50 mm
C) 0.63 mm
D) 0.80 mm
E) 0.25 mm