Engineering Board Exam Reviewer · Engineering Materials · hard
An n-type silicon sample has 1 × 1022 free electrons per m3 with an electron mobility of 0.14 m2/V· s. What is its electrical conductivity? (e = 1.602 × 10-19 C)
- 224 ( · m)-1
- 1602 ( · m)-1
- 140 ( · m)-1
- 2243 ( · m)-1
Answer
A. 224 ( · m)-1
Solution
= n|e| e = (1022)(1.602 × 10-19)(0.14) = 224 ( · m)-1.
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