Resistance and Resistivity: The resistivity of gold is 2.44 × 10-8 ? ? m at a temperature of 20°C. A gold wire that is 0.50 mm in diameter and 44 cm long carries a current of 380 mA. How many electrons each second pass a given cross section of the wire at 20°C? (e = 1.60 × 10-19 C)
A. 2.4 × 1018
B. 2.4 × 1017
C. 1.2 × 1022
D. 2.8 × 1014
E. 6.3 × 1015
Answer: A
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Fill in the blank(s) with the appropriate word(s).
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