ASK YOUR TEACHER S3LON The figure below shows three small, positively charged beads at three cormers of a rectangle, The particle at upper left has a charge q, - 6.00 nC, the one at the lower left has a charge of g, = 4.00 nC, and the one at lower right has a charge q, - 8.00 nC. The rectangle's horizontal side has length x -5.50 cm and its vertical side has length y = 2.50 cm. (a) What is the electric potential (in V) at the upper-right corner of the rectangle? (Assume the zero of electric potential s atininity.) (b) What would be the potential (in V) at the upper-right carner if the charge , at lower left was 4.00 nC instcad?

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