Chapter 20, Problem 107PP

Predict/Calculate Referring to Example 20-9 Suppose the charge −2q at x = 1.00 m is replaced with a charge −3q, where q = 4.11 × 10^-9C. The charge +q is at the origin. (a) Is the electric potential positive, negative, or zero at the point x = 0.333 m? Explain. (b) Find the point between x = 0 and x = 1.00 m where the electric potential vanishes. (c) Is there a point in the region x < 0 where the electric potential passes through zero?