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Question

point charge q1=+2.40μC is held stationary at the origin. A second point charge q2=4.30μC moves from the point x=0.150m,y=0 to the point x=0.250m,y=0.250m. The amount of work is done by the electric force on q2 is 356×10xJ. Find x.

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Solution

PE at final point = PE at initial point + work done
Work done = PE at final point - PE at initial point = 14πϵq1q20.152+0214πϵq1q20.252+0.252=0.356J
Work done by electric force = - work done = -0.356 J

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