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Homework Help: Density Question?

  1. Oct 4, 2007 #1
    The density of mobile electrons in copper metal is 8.4 1028 m-3. Suppose that i = 7.5 1018 electrons/s are drifting through a copper wire. (This is a typical value for a simple circuit.) The diameter of the wire is 1.7 mm. In this case, about how many minutes would it take for a single electron in the electron sea to drift from one end to the other end of a wire 31 cm long?

    Answer: in minutes please
  2. jcsd
  3. Oct 5, 2007 #2


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