Study Guide - Physics 2212 - Chapters 23 and 23 Chapter 22 These concepts are the most important concepts of chapter 22: 1. Coulomb’s law 2. Charge is quantized Sample problems related to these concepts are: MasteringPhysics Homework - Problems 1, 4, 5, 8, 9, 11, 12 Chapter 23 These concepts are the most important concepts of chapter 23: 1. Electric field due to a system of point charges 2. Electric field of a dipole 3. Electric field due to: A thin rod, a circle (a thin ring) Sample problems related to these concepts are: MasteringPhysics Homework - Problems 1, 2, 4, 5, 9, 10, 11