1. The problem statement, all variables and given/known data Okay, I totally do not understand how to derive the electric field made by a dipole or a line or a ring or etc. 2. Relevant equations When finding the electric field, when you make an estimate, saying that the test charge is very far away, it should be similar to kQ/r^2 You may need to know lambda, the linear charge distribution and the ones for area and volume. 3. The attempt at a solution I've made lots of attempts. Its 2 am right now, but I will upload it tomorrow if anyone needs it. Someone asked a question like this before, if that helps, but I didn't understand the answer and I need help with all of these things.