Solution: The resistivity of gold is 2.44 x 10 -8 Ω•m at a temperature of 20°C. A gold wire, 1.4 mm in diameter and 17 cm long, carries a current of 190 ma. The power dissipated in the wire is closest to:
A) 0.043 mW
B) 0.079 mW
C) 0.061 mW
D) 0.024 mW
E) 0.097 mW

The resistivity of gold is 2.44 x 10 ^{-8} Ω•m at a temperature of 20°C. A gold wire, 1.4 mm in diameter and 17 cm long, carries a current of 190 ma. The power dissipated in the wire is closest to:

A) 0.043 mW

B) 0.079 mW

C) 0.061 mW

D) 0.024 mW

E) 0.097 mW