1. The problem statement, all variables and given/known data A rod 14.0 cm long is uniformly charged and has a total charge of -22.0μC. Determine (a) the magnitude and (b) direction of the electric field along the axis of the rod at a point 36.0 cm from its centre. [I can do (b)] 2. Relevant equations Electric field at the point due to a small element, ΔE=(k Δq)/(x^2) 3. The attempt at a solution I got down to the total field at P being, (kQ/l) * integral of 1/x^2 from x=0.29 and x=0.43 and I get 6.17 * 10^5 NC^-1 But the answer says 1.59 * 10^6 NC^-1 Are the answers wrong?