The figure shows a rectangular array of charged particles +2q1 fixed in place, with distance a = 39.0 cm and the charges shown as integer multiples of q1= 3.40 pC and q2 6.00 pC: With V=0 at infinity, what is the net electric potential at the rectangle's center? Ignore the three lower charges for this part of the question. What is the electric potential energy associated with assembling the upper three charges (i.e. bringing in all three charges from infinity to these locations)?
+442
341
+291
+442