Topic open: Resistor networks

The following topic is now open for questions: Resistor networks.

To pose a question, please post a comment to this post by clicking on the comments link below.

Solution to first homework: a ring of charge

The solution to my first "homework" exercise is posted on the homework page.

Please let me know if you have questions about the solution, or if you think / don't think similar exercises would be helpful in future.