KVL Loop Walkthrough
Description
This MicroSim traces a highlighted path around a circuit loop, step by step. At each component the sim shows whether the traversal encounters a voltage rise (+) or voltage drop (−), building a running sum displayed on the right. At the end of the loop the sum is shown to be zero, confirming KVL. Multiple loop paths can be selected to practice with different circuit topologies.
Key Concepts
- Kirchhoff's Voltage Law (KVL): The algebraic sum of all voltage changes around any closed loop is zero: \(\sum V = 0\).
- KVL is a consequence of conservation of energy — no net work is done moving a charge around a closed path.
- Traversal convention: crossing a source from − to + is a rise; crossing a resistor in the direction of current is a drop.
- KVL provides one independent equation per independent loop in the circuit.
- Combined with KCL, KVL provides enough equations to solve for all branch currents and node voltages.