Read through the course notes before watching the video. The course note files may also contain links to associated animations or interactive simulations.
Read sections 2.1 through 2.8:
Coulomb's Law (PDF)
Read through the class slides. They explain all of the concepts from the module.
Do the Concept Questions first to make sure you understand the main concepts from this module. Then, when you are ready, try the Challenge Problems.
Watch the Problem Solving Help video for insights on how to approach and solve problems related to the concepts in this module.
We have a charge +q located at aî on the positive x-axis, and a charge –q located at -aî on the negative x-axis. Find the electric field everywhere in space. Using your general expression, find the electric field at a distance r»a far from the origin. Show that at this distance the electric falls off as inverse r cubed.
The visualizations linked below are related to the concepts covered in this module.