Steps to Determine Node Voltages:
1. Select a node as the reference node, Assign voltages v1, v2, . . . . . ,
vn-1 to the remaining n-1 nodes. The voltages are referenced with respect to the reference node.
2.Apply KCL to each of the n-1 non-reference nodes. Use Ohm’s law to express currents in terms of node voltages.
3. Solve the resulting simultaneous equations to obtain the unknown node voltages.
Nodal Analysis with Voltage Sources
Case 1: If the voltage source (dependent or independent) is connected between two non-reference nodes, the two non-reference nodes form a generalized node or super node, we apply both KCL and KVL to determine the node voltages.
Case 2: if a voltage source is connected between the reference node and a non-reference node, we simply set the voltage at the non-reference node equal to the voltage of the voltage source.
~ In every different kind of circuits when in comes to analyzing and solving, we should practice the steps of determining the node voltages and must able to observe if what kind of case the circuit is.
~ In every different kind of circuits when in comes to analyzing and solving, we should practice the steps of determining the node voltages and must able to observe if what kind of case the circuit is.
To understand more, watch this video :)
There are some instances that a voltage source is in between to the two non-reference node in a loop, that's SUPERNODE.
In circuit theo, a super-node is a theoretical construct that can be used to solve a circuit. This is done by viewing a voltage source on a wire as a point source voltage in relation to other point voltages located at various nodes in the circuit, relative to a ground node assigned a zero or negative charge.
The application that needs to study:
- KVL/KCL (on my CHAPTER 2 blog)
- Cramer's rule
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