Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Ampere-Maxwell Law

  1. Feb 27, 2010 #1
    Hello to all. I am looking at an example in my book (again. =O)

    The example has two metal cylinders with a distance, d between them

    The problem states that a voltage V(t) is applied between the plates.

    What do they mean by that?

    (I thought it was an oscillating voltage, since they have a sin(kt) term in the V(t) equation. Is that different from the capacitor being charged at a constant rate by a steady current).
  2. jcsd
  3. Feb 27, 2010 #2
    Recall that the charge Q in a cylindrical capacitor is

    Q(t) = C·V(t)

    where C is the capacitance and V(t) is the applied voltage. differentiating, we get the current I(t):

    I(t) = C·dV(t)/dt

    Bob S
  4. Feb 28, 2010 #3
    I see. Thanks
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook