The Fermi temperature of Cu is about 80,000 K. Which of the following is most nearly equal to the average speed of a conduction electron in Cu?
A. 2 × 10−2 m/s
B. 2 m/s
C. 2 × 102 m/s
D. 2 × 104 m/s
E. 2 × 106 m/s
(GR9277 #23)
Solution:
TF = 8 × 104 K
me = 9.11 × 10−31 kg
k = 1.38 × 10−23 J/K
Fermi energy = Kinetic energy
Answer: E
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