Okay, I totally do not understand how to derive the electric field made by a dipole or a line or a ring or etc.
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.
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.