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Homework Help: Question 4

  1. Feb 4, 2005 #1
    The electron drift speed in a gold wire is 3.0 * 10^-4.

    1. What is the current density in the wire?

    2. What is the current if the wire diameter is 0.50 mm?

    I am unsure of which equation to use.
    Q = I delta t ??

    Can someone help me out?
  2. jcsd
  3. Feb 4, 2005 #2
    Is it too hard to post all your questions in one thread?

    Also, how on Earth does Q = I delta t help you? How about I = nAqv?
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