NODE ANALYSIS SOLVED PROBLEMS USING KCL - Part1

The node analysis method is based on the Kirchhoff’s current law (KCL). In this method, one node is assumed as a reference node and its potential is assumed to be zero. This node is also called zero potential node or base node or datum node.
At other nodes, the node voltage variables are assumed whose voltages are measured with respect to base node. These nodes are called major nodes.
The various branch currents are assumed and KCL equations are written at all the major nodes. The current variables are then expressed in terms of assumed node voltage variables and branch resistances, by analyzing each branch independently.
Using these expressions in the KCL equations, a set of simultaneous equations in terms of node voltage variables is obtained.