Resistance and Resistivity: How much current will flow through a 40.0-m length of metal wire with a radius of 4.0 mm if it is connected to a power source supplying 16.0 V? The resistivity of the metal is 1.68 × 10-8 ? ? m.
A. 1200 A
B. 9.5 × 108 A
C. 68 nA
D. 710 A
Answer: A
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