1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
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