3.1. Introduction Step to analyze AC Circuits: 1.Transform the circuit to the phasor or frequency domain. 2.Solve the problem using circuit techniques (nodal analysis, mesh analysis, superposition, etc.) 3.Transform the resulting phasor to the time domain.

3.2. Nodal Analysis Solution:

3.2. Nodal Analysis

From node 1 From node 2

3.2. Nodal Analysis

Example 3.2 Solution: Nodes 1 and 2 form a supernode as shown Fig. Applying KCL at the supernode gives;

Example 3.2 Voltage source connected between nodes 1 and 2;

3.3. Mesh Analysis Applying KVL to mesh 1, we obtain

3.3. Mesh Analysis

Example 3.4 As shown fig, meshes 3 and 4 form a supermesh due to the current source between the meshes.

For mesh 1 Example 3.4 For mesh 2

Example 3.4

Example 3.5

Example 3.6