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Homework Help: Charge of a segment of an infintely long wire

  1. Mar 15, 2010 #1
    1. The electric field 5.70 cm from a very long charged wire is ( 1900 N/C,toward the wire). What is the charge (in nC) on a 1.0-cm-long segment of the wire?

    2. E_line = (1/4*pi*epsilon) * (2*lambda/r), lambda = Q/L

    3. Using the above equation, I solved for Q using r = 5.7 cm and L = 1 cm, and got an answer several orders of magnitude off. I assume I am using incorrect r and L values. What, exactly, am I doing wrong?
  2. jcsd
  3. Mar 15, 2010 #2


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    Homework Helper

    You're using the right values. I'm guessing you made a calculation error or a unit conversion error.
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