1. Review Node Voltage Method
Chapter 4-2
Review
Node Voltage Method

2. Node-Voltage method
1. Draw circuit with no branches crossing

3. Node-Voltage method
2. Count the number of essential nodes (ne ), you will need
(ne -1) equations to describe the circuit,

4. Node-Voltage method
3. This circuit has three essential nodes
4. choose one as a reference node, typically the node with the
most branches
5. Assign remaining essential nodes with node voltages, in this
case nodes 1 and 2.
A Node Voltage is defined as the voltage rise from the reference node to a
non-reference node

5. 6. Label the nodes and label currents as leaving the nodes, one node at a time
apply KCL, using ohms law to write in terms of voltages summed to zero at the
node
7. Repeat step 6 for the other nodes

7. You Do

8. You Do

12. What you should know
Node Voltage method
Example 1