Node voltage method (steps 1 to 4)  Circuit analysis  Electrical engineering  Khan Academy  Summary and Q&A
TL;DR
The Node Voltage Method is a powerful technique to analyze circuits by using node voltages, which are measured between nodes and a reference node.
Questions & Answers
Q: What is the Node Voltage Method?
The Node Voltage Method is a technique used to analyze circuits by using node voltages. It involves selecting a reference node, naming the node voltages, solving the easy nodes, writing Kirchoff's Current Law equations, and solving the equations.
Q: How are node voltages measured?
Node voltages are measured between nodes and a reference node. They represent the voltage at a specific node with respect to the reference node.
Q: How do you solve for easy nodes in the Node Voltage Method?
Easy nodes are the ones directly connected to a source that goes to the reference node. To solve for easy nodes, you can inspect the circuit and determine the voltage by inspection.
Q: How are Kirchoff's Current Law (KCL) equations written in the Node Voltage Method?
In the Node Voltage Method, KCL equations are written directly from the circuit. The currents flowing into a node are summed up, with negative signs for currents flowing out of the node.
Summary & Key Takeaways

The Node Voltage Method is used to analyze circuits by using node voltages.

Node voltages are measured between nodes and a reference node.

The method involves selecting a reference node, naming the node voltages, solving the easy nodes, writing Kirchoff's Current Law equations, and solving the equations.