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Physics 2 Electric Fields, Circuits, Magnetism

  1. May 6, 2016 #1
    Can someone please help me out with this practice test and provide explanations? upload_2016-5-6_21-3-24.png upload_2016-5-6_21-4-14.png upload_2016-5-6_21-4-47.png upload_2016-5-6_21-5-14.png upload_2016-5-6_21-5-33.png upload_2016-5-6_21-5-52.png upload_2016-5-6_21-6-6.png upload_2016-5-6_21-3-24.png upload_2016-5-6_21-4-14.png upload_2016-5-6_21-4-47.png upload_2016-5-6_21-5-14.png upload_2016-5-6_21-5-33.png upload_2016-5-6_21-5-52.png upload_2016-5-6_21-6-6.png upload_2016-5-6_21-3-24.png upload_2016-5-6_21-4-14.png upload_2016-5-6_21-5-33.png upload_2016-5-6_21-5-52.png upload_2016-5-6_21-6-6.png upload_2016-5-6_21-5-14.png upload_2016-5-6_21-4-47.png
    upload_2016-5-6_21-3-24.png

    upload_2016-5-6_21-4-14.png

    upload_2016-5-6_21-4-47.png
    upload_2016-5-6_21-5-14.png
    upload_2016-5-6_21-5-33.png
    upload_2016-5-6_21-5-52.png
    upload_2016-5-6_21-6-6.png
     
  2. jcsd
  3. May 6, 2016 #2
    So for number 1 a, when r<R, I take +Ze as q and plug it into the equation E = kq/r2 and get E = kZe/R2. Not sure if that's correct
     
  4. May 6, 2016 #3
    Then for number 1 b when r>R, I assume that E is zero since you set a Gaussian surface that encloses the entire thing so you take the enclosed charge which would be zero since it is +Ze and -Ze which cancels. So when you plug that in to solve for E, you would get zero. Please lmk if this is correct.
     
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