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[" Example 21.15Two point charges are lo...

[" Example 21.15Two point charges are located on the x-axis,"q_(1)=-1 mu C" at "x=0" an "],[q_(2)=+1 mu C" ar "x=1" m "],[" (a) Find the work that must be done by an external force to bring a third point charge "],[" (b) Find the t muCfrom inflity to "x=2" mexternal force to bring a third point charge "],[" b) Find the total potential energy of the system of three charges."],[" Solution "(" c) "" The "]

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