The basic elements of circuit design are components (resistors, capacitors, and inductors), and sources (voltage and current). We describe these elements as both ideal elements and real-world objects.

We also develop precise terminology for how to talk about the parts of circuits (nodes and branches).

Finally, we learn about assigning labels to voltages and currents.

Ideal circuit elements

Ideal sources

Ideal elements and sources

Real-world circuit elements

Circuit terminology

Circuit terminology

Schematic equivalence

Sign convention for passive components

Sign convention for passive components

Labeling voltages

Inductor - how it works