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 7.1 through 7.5:
Direct-Current Circuits (PDF)
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 videos for insights on how to approach and solve problems related to the concepts in this module.
A circuit consists of three batteries and six resistors, arranged in two loops. Two of the batteries have unknown voltages. Given the currents in the two loops, we solve for the unknown battery voltages.
A set of 5 resistors and a switch are arranged in a circuit with two loops. Initially the switch is open, and then it is closed. We find the current in the branches of the circuits in both circumstances.