Exercises: Parallel Circuits

Work through each section in order. Show all steps: find R_eq, then branch currents, then verify with KCL.

Grade 11·21 problems·~30 min·OpenStax Physics (High School)·section·sec-19-3

Work through problems with immediate feedback

Recall / Warm-Up

Kirchhoff's Current Law (KCL) states that at any junction in a circuit:

The total current entering the junction equals the total current leaving the junction.

The sum of all voltage drops around any closed loop equals the source voltage.

KCL applies only to parallel circuits; KVL applies only to series circuits.

The current through each branch is equal at a junction.