Resistance and Resistivity: A certain metal has a resistivity of 1.68 × 10-8 ? ? m. You have a long spool of wire made from this metal. If this wire has a diameter of 0.15 mm, how long should you cut a segment so its resistance will be 15 ??
A. 16 mm
B. 16 cm
C. 1.6 m
D. 16 m
Answer: D
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