Homework Help: Physics

Posted by Kristi on Saturday, October 8, 2011 at 2:37pm.

A)Two point charges, +3.90 錀 and -7.50 錀, are separated by 3.30 m. What is the electric potential midway between them?

B)The drawing shows four point charges. The value of q is 1.3 錀, and the distance d is 0.95 m. Find the total potential at the location P. Assume that the potential of a point charge is zero at infinity.

Physics - drwls, Saturday, October 8, 2011 at 2:43pm
For the potential at any point, add up the kQi/Ri terms due to all surrounding charges. Ri is the distance from each charge Qi. k is the Coulomb constant.
Physics - Kristi, Saturday, October 8, 2011 at 4:32pm
I have done this, but I still cannot get the correct answer.

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