This Physics video tutorial explains how to use the Electric Field Vector Formula with the R-Hat vector and Position Vector.

Coulomb's Law: https://bit.ly/3QeCkqx
Electric Fields - Part 1: https://bit.ly/3ZfWyUU
Electric Fields - Part 2: https://bit.ly/3WVnl7u
Electric Potential: https://bit.ly/3GJyRx5
Electric Potential Energy: https://bit.ly/3Gn3dDQ
Physics PDF Worksheets: https://www.video-tutor.net/physics-basic-introduction.html