Three charged particles are positioned in the xy plane: a 50-nC charge at y = 6 m on the y axis,a -80-nC charge at x = -4 m on the x axis,and a 70-nc charge at y = -6 m on the y axis.What is the electric potential (relative to a zero at infinity)at the point x = 8 m on the x axis?
A)+81 V
B)+48 V
C)+5.8 V
D)-72 V
E)-18 V

Question

Quizplus · Accepted Answer

The electric potential at a point due to a point charge is given by V = kQ/r. Calculate the potential at x = 8 m due to each charge separately and sum them up. The potential due to the 50-nC charge is positive, the potential due to the 80-nC charge is negative, and the potential due to the 70-nC charge is positive. The sum of these potentials gives approximately +48 V.

Three Charged Particles Are Positioned in the Xy Plane: a 50-NC