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The charges QA = –3μC, QB = –4μC and QC = –8μC are located on the...

The charges QA = –3μC, QB = –4μC and QC = –8μC are located on the same line. Load A is at a distance of 1m from load B, and load C is located between the two. a) If the total electric force on QC due to the other two charges is zero, calculate the distance between QC and QA. [1 mark]
b) What is the potential energy of the system? [1 mark]
c) Calculate the work required to move the load C from the point where it is to one
point equidistant between A and B. Interpret the result sign. [1 mark]
9 2–2 Dada: k = 1 / (4πε0) = 9 · 10 N · m · C.

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