The density of free electrons in gold is 5.90 × 1028 m-3. The resistivity of gold is at a temperature of 20°C and the temperature coefficient of resistivity is A gold wire, 1.1 mm in diameter and 29 cm long, carries a current of 650 mA. The drift velocity of the electrons in the wire is closest to:
Answer
8.3 × 10-5 m/s
1.0 × 10-4 m/s
1.2 × 10-4 m/s
9.4 × 10-5 m/s
7.3 × 10-5 m/s