The conductivity of a metal is determined by____________?
Correct answer: A. the electronic concentration and the mobility of the free electrons
- A. the electronic concentration and the mobility of the free electrons
- B. the number of valence electrons per atom
- C. either (A) or (B)
- D. none of the above
Explanation
Conductivity is given by σ = neμ, where n is the concentration of free electrons, e is their charge, and μ is their mobility. Thus both electron concentration and mobility determine the conductivity.
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