Question

The figure below shows three small, positively charged spheres at three corners of a rectangle. The particle at upper left has a charge q1 = 5.00 nC, the one at the lower left has a charge of q2 = 6.00 nC, and the one at lower right has a charge q3 = 3.00 nC. The rectangle's horizontal side has length x = 5.50 cm and its vertical side has length y = 4.00 cm. What is the electric potential (in V) at the upper-right corner of the rectangle? (Assume the zero of electric potential is at infinity.) What would be the potential (in V) at the upper-right corner if the charge q2 at lower left was −6.00nC instead?

          The figure below shows three small, positively charged spheres
at three corners of a rectangle. The particle at upper left has a
charge q1 = 5.00 nC, the one at the lower left has a charge of q2 =
6.00 nC, and the one at lower right has a charge q3 = 3.00 nC. The
rectangle's horizontal side has length x = 5.50 cm and its vertical
side has length y = 4.00 cm.
What is the electric potential (in V) at the upper-right corner
of the rectangle? (Assume the zero of electric potential is at
infinity.)
What would be the potential (in V) at the upper-right corner if
the charge q2 at lower left
was −6.00nC instead?

Added by Catherine L.

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