Question

Four identical point charges are located on the corners of rectangle as shown q1 Q2 Q3 and Q4 (g=10 microcoulomb) with dimensions of 60 cm by 15 cm. Calculate the magnitude and direction on Q3 by the other three charges
Q=10 microcoulomb
a few seconds with google will get you to

www.quora.com/There-are-four-equal-charges-that-are-kept-at-each-corner-of-a-square-How-do-I-calculate-the-force-experienced-by-one-charge-What-is-the-final-expression
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