The thin, uniformly charged rod shown in the figure below has a linear charge density λ. Find an expression for the electric potential at P. (Use k_e for ke, lambda for λ, a, b, and L as necessary.) 2. Relevant equations dV=k*dq/r lambda*dx=dq 3. The attempt at a solution I integrated using the above equations and went from 0 to L. I thought this was the right way to do it but I keep getting the wrong answer.