Concentric Eletric Field Question

  • Thread starter CH1991
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  • #1
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Homework Statement





Homework Equations





The Attempt at a Solution



Hi! I have already write everything on the pictures(In attachment), I have already circled the correct answer, however, I am not sure explain it correctly. So, can you check my explanation or question?
Thanks!

7e2mO.png
 

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Answers and Replies

  • #2
Spinnor
Gold Member
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Draw an imaginary surface that contains both the thick conductor and the line of charge. What is the net charge per length inside that surface?
 

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