1. The problem statement, all variables and given/known data The potential difference between the surface of a 2.2 cm -diameter power line and a point 1.9 m distant is 3.8 kV. What is the magnitude of the line charge density on the power line? Express your answer using two significant figures. 2. Relevant equations V = (λ/2πε0)ln(2a/r) 3. The attempt at a solution I simply converted some of the values to base units and got 3800 V = (λ/2π(8.9e-12C))(2(0.022m)/1.9m) = -5.6e-8 C/m which is -56.4 nC/m. Its wrong however. I don't get what I am doing wrong with I solve for λ.