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Homework Help: I know I am doing this problem right but I keep getting the wrong answer

  1. Jun 21, 2004 #1
    2 parallel plates connected to a 95V power supply are separated by an air gap. How small can the gap be if the air is not to exceed its breakdown values of E=3e6 V/m.

    I did E = V/d and I got that d = 3.17*10^7 and webassign keeps telling me that the answer is wrong. Could someone please help me.
  2. jcsd
  3. Jun 21, 2004 #2


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    Science Advisor
    Gold Member

    Looks like you're doing it right but you just miscalculated.

    E<=V/d --> d <= V/E = 95/(3E6)

    Your exponent is incorrect.
  4. Jun 21, 2004 #3
    thanks so much :)
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