Walker, Halliday & Resnick — Electric Potential: Problem 4

4 Figure 24-24 shows a thin plastic rod of length L = 13.5 cm and uniform charge 43.6 fC. (a) In terms of distance d, find an expression for the electric potential at point \(P_1\). (b) Next, substitute variable x for d and find an expression for the magnitude of the component \(E_x\) of the electric field at \(P_1\). (c) What is the direction of \(E_x\) relative to the positive direction of the x axis? (d) What is the value of \(E_x\) at \(P_1\) for x = d = 6.60 cm? (e) From the symmetry in Fig. 24-24, determine \(E_y\) at \(P_1\).