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# NODAL AND MESH ANALYSIS

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## NUR ATHIRAH NOR RAHMAN

on 18 December 2013

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#### Transcript of NODAL AND MESH ANALYSIS

Nodal Analysis
• Technique based on systematic application of
KCL.
• Node voltages are used as the circuit variables.
• Important point when writing the expression for
current flow resistance is a passive element,
by the passive sign convention, current must
always flow from a higher potential to a lower
potential
circuit 1
circuit 2
circuit 3
NODAL AND MESH ANALYSIS
Mesh Analysis
Steps in analysing the circuit.

1. Clearly label all circuit parameters and distinguish the unknown parameters from the known.
2. Identify all nodes of the circuit.
3. Select a node as the reference node also called the ground and assign to it a potential of 0 Volts. All other voltages in the circuit are measured with respect to the reference node.
4. Label the voltages at all other nodes.
5. Assign and label polarities.
6. Apply KCL at each node and express the branch currents in terms of the node voltages.
7. Solve the resulting simultaneous equations for the node voltages.

• Technique based on systematic application of KVL.
• Mesh currents are used as the circuit variables.
• Mesh analysis is only applicable to a circuit that is planar
A planar circuit is one that can be drawn in a
plane with no branches crossing one another
Steps in analysing the circuit
1. Define a mesh current for each mesh
2. Write KVL equations with the voltages must
be expressed in terms of the mesh currents
3. Solve the equations
4. Compute the element currents and voltages
of interest from the mesh currents.
nodal
mesh
nodal

nodal
mesh
circuit 4
nodal
mesh
GROUP'S MEMBER
1. NUR ATHIRAH BINTI NOR RAHMAN (AE130170)
2. NORZAIDHATUL SYAZWA BINTI
JAMAL NASIR (AE130083)
3. NURSHAFINAH BINTI ABU BAKAR (AE130010)