In this chapter, the following content will be discussed: Three passive elements (resistors, capacitors, and inductors) individually, circuits having various combinations of two or three of the passive elements, RC and RL circuits, analysis of RC and RL circuits by applying Kirchhoff’s laws, the differential equations resulting from analyzing RC and RL circuits are of the first order. Hence, the circuits are collectively known as first-order circuits. | Lecture Electric circuits analysis - Lecture 26 First-order circuit