Question

# The figure below shows three small, positively charged spheres at three corners of a rectangle. The...

The figure below shows three small, positively charged spheres at three corners of a rectangle. The particle at upper left has a charge q1 = 6.00 nC, the one at the lower left has a charge of q2 = 7.00 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 = 3.50 cm.

Three positive charges lie at three of the corners of a rectangle of horizontal side length x and vertical side length y < x.

• An charge labeled q1 is at the upper left corner.
• A charge labeled q2 is at the lower left corner.
• A charge labeled q3 is at the lower right corner.

(a)What is the electric potential (in V) at the upper-right corner of the rectangle? (Assume the zero of electric potential is at infinity.)

V

(b)What would be the potential (in V) at the upper-right corner if the charge q2 at lower left was

−7.00

V