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(Solved): Find a formula for the electric field magnitude at the position of the red dot. Your formula should ...
Find a formula for the electric field magnitude at the position of the red dot. Your formula should contain the symbols
Q,Land
\epsi lon_(0). Hint: Google or Wolfram Alpha can help you with this integral, but only if you do a u-substitution to make it not have units. This means that you need to replace
(2L-x)^(2)with
4L^(2)(1-u^(2))with
u=(x)/(2L). Don't forget to change
dxto
duas well. Or you can just use your integration skills and avoid Steve Wolfram altogether. Or try typing "integral of (...) "into Google and then put the proper limits into the indefinite integral to get the final answer.
