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Homework Help: Need some help with this homework -- Conducting Spheres and Charge

  1. Aug 28, 2015 #1
    • Poster has been reminded by the Mentors that they need to use the HH Template and show their work
    Hi, I need some help with this homework from my Electromagnetism course. I hope this is the correct place to post this. (Please excuse any potential english mistake I made trying to translate this).

    Problem 1:
    Copper (conductor) sphere of radious R with an spheric bubble inside placed at distance c from the center, with radius b. The metalic sphere has charge Q.

    1.-Find the electric potential inside the bubble
    2.-Is the result modified if the bubble is not a sphere?

    Problem 2:

    1.-Explain what a monochromatic plane wave is, identify the dirction of propagation, the velocity of propagation, wave lenght and polarization.

    2.- In the case of plane electromagnetic waves, probe E and B fields are perpendicular between each other. and perpendicular to the direction of propagation.

    Last edited by a moderator: Aug 28, 2015
  2. jcsd
  3. Aug 28, 2015 #2

    jim mcnamara

    User Avatar

    Staff: Mentor

    Let's try problem #1 - what have your tried so far?
  4. Aug 28, 2015 #3
    I will try to use this math symbols the best I can (first time using them on a post :) ). I might be wrong, but what I think is that I should have the charge Q distributed in both surfaces so I have the denisty of charge ρ= Q/ (4πR^2+4πb^2). Then I can use Gauss and have the electric field inside the bubble? ρ / ∈0. After that I'm completley lost.
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