Monthly Archives: June 2010

Nodal Analysis - Dependent Voltage Source


Use nodal analysis method to solve the circuit and find the power of the  3\Omega - resistor.
Nodal Analysis  Dependent Current Source


Solution

I. Identify all nodes in the circuit.
The circuit has 3 nodes as shown below.
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Nodal Analysis - Dependent Current Source


Deploy nodal analysis method to solve the circuit and find the power of the dependent source.
using nodal analysis method to find the power of a dependent current source

Solution
I. Identify all nodes in the circuit. Call the number of nodes  N.
The circuit has 4 nodes:
 all nodes
Therefore,  N=4.
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Nodal Analysis - Dependent Voltage Source (5-Nodes)


Solve the circuit with the nodal analysis and determine  I_x.
Nodal analysis - circuit with dependent voltage source

Solution
1) Identify all nodes in the circuit. Call the number of nodes  N.
There are five nodes in the circuit:
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Reference Node and Node Voltages


Reference Node
In circuits, we usually label a node as the reference node also called ground and define the other node voltages with respect to this point. The reference node has a potential of  0 V by definition. The following symbol is used to indicate the reference node:

The Reference Node Symbol

The Reference Node Symbol



As mentioned, the selection of the reference node is arbitrary. However, a wise selection can make the solving easier. As a general rule, it is usually chosen to be
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