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, a -***Show all necessary works with proper explanation; Partial credit will be given if merited. 1. Three point charges, each of magnitude 3.00 nC, are at separate corners of a square of edge length 5.00 cm. The two point charges at opposite corners are positive, and the third point charge is negative. Find the electric force exerted by these point charges on a fourth point charge an: =+3.00 nC at the remaining comer. Y,cm q2=+3.00nC q4=+3.DDnC K, cm :13: -3.DDI'IC q1=+3,00nC 0.00 cm 2. A -2.5 pC point charge and a -3.3 |.lC point charge are a distance L apart. Where should a third point charge be placed so that the electric force on that third charge is zero