A copper wire has n = 8.5 10^28 m^-3, cross-section 2 10^-6 m^2 and drift velocity 5 10^-5 m/s. The current is (e = 1.6 10^-19 C):

  1. 1.36 A
  2. 2.72 A
  3. 13.6 A
  4. 0.136 A
Answer

A) 1.36 A

I = nAvq = 8.5 10^28 2 10^-6 5 10^-5 1.6 10^-19 = 1.36 A. SLO P-09-E-10 · Application

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