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!

Homework Help: Charged ring.

  1. Feb 23, 2007 #1
    1. The problem statement, all variables and given/known data

    I have the field at the center of a charged ring on the x,y axes (top half has charge density of -lambda, bottom is +lambda lambda=la) to be
    E=(lay^)/(2pi epsR) (eps=epsilon) i cant find the potential for this, R=radius,
    Can anyone help?

    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 23, 2007 #2
    Normally, it's easier to find the potential first, as it is a scalar, and then take the partial derivative with respect to the distance variable to determine the E-Field.

    In this case, your expression doesn't make sense.

    [tex]
    E = \frac{\lambda y}{2 \pi \epsilon_0 R}
    [/tex]

    Are you sure that's correct? Because that implies that as you get further away from the ring, the e-field increases, which doesn't make sense.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook




Loading...