Tag Archives: reference node

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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Problem 1-10: Solving by Nodal Analysis - Circuit with Four Nodes


Solve the circuit by nodal analysis and find  V_a .
Circuit with Four Nodes

Solution
a) Choose a reference node, label node voltages:
Choosing a reference node and labelling node voltages
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Problem 1-8: Nodal Analysis - Power of Current Source


Solve the circuit using nodal analysis and find the power of  Is_1 .
Problem 1-8 - Nodal Analysis and Power Calculation

Solution
a) Choose a reference node, label the voltages:
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