1. The problem is to understand what nodal analysis is in electrical engineering. 2. Nodal analysis is a method used to determine the voltage at different points (nodes) in an electrical circuit. 3. The key formula used is based on Kirchhoff's Current Law (KCL), which states that the sum of currents entering a node equals the sum of currents leaving the node. 4. To apply nodal analysis, assign a voltage variable to each node except the reference (ground) node. 5. Write KCL equations for each node in terms of the node voltages and circuit elements (resistors, current sources, etc.). 6. Solve the system of equations to find the node voltages. 7. This method helps analyze complex circuits systematically and find unknown voltages and currents.