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Homework Help: Electric field intensity with a charge decreasing over time

  1. Apr 8, 2014 #1
    So a lossy dielectric sphere gets an initial charge distribution evenly across the sphere.

    Find an expression for E inside and outside the sphere for all t.

    I figured that σ∇E=dp/dt
    p being volume denity.

    So I apply spherical coordinates to the div of E and integrate over r to get an expression for E. But I need to do something with the dp/dt since I want t in the expression.
  2. jcsd
  3. Apr 9, 2014 #2


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    2017 Award

    Hello For,

    Perhaps you have a better chance to get some assistance if you formulate a bit more completely using the template. Lossy ? ## \sigma ## <--> dp/dt ?
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