Fundamentals of Physics Extended (10th Edition)

Published by Wiley
ISBN 10: 1-11823-072-8
ISBN 13: 978-1-11823-072-5

Chapter 24 - Electric Potential - Problems - Page 711: 23b

Answer

At point $P$, $~~~V = 0$

Work Step by Step

We can write a general equation for the net electric potential at a point: $V_{net} = \frac{1}{4\pi~\epsilon_0}\sum \frac{q_i}{r_i}$ By symmetry, the electric potential due to the positive charge on the left half of the rod cancels out with the electric potential due to the negative charge on the right half of the rod. At point $P$, $~~~V = 0$.
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