The charge per unit length on a long, straight filament is -95.0 µC/m. (a) Find the electric field 10.0 cm from the filament. Distances are measured perpendicular to the length of the filament. (Take radially inward toward the filament as the positive direction.) My answer: 1.07 MN/C (b) Find the electric field 29.0 cm from the filament. My answer: 3.11 MN/C (c) Find the electric field 120 cm from the filament. My answer: 12.9 MN/C Formula: 4*pi*8.99*10^9*distance*(-95*10^-6) On the side of caution I've used both + and - aforementioned answers and both seem wrong. Am I missing something here? I thought http://physics.villanova.edu/faculty/shaw/2402/extprob/m1224.gif [Broken] ?