Apply circuit laws and rules in ac analysis<|>Use rms values in voltage and current calculations<|>Determine the resultant waveform of superimposing ac and dc components
All circuit laws and rules apply to ac circuits in the same way they apply to dc circuits
For an ac circuit, all ac voltages and currents are in rms values unless otherwise specified
Example 1: Determine the voltage drops across each resistor and the circuit current
1. Find total resistance RT
2. Apply Ohm's law to find current I
3. Voltage drop across R1, V1 = I x R1
4. Voltage drop across R2, V2 = I x R2
5. Can also apply VDR to find voltage drops
Superimposed dc and ac voltages
In many circuit practices, you will find both ac and dc voltages combined
Case 1: If Vdc > Vp
1. Vmax = Vdc + Vp
2. Vmin = Vdc - Vp
3. Sine wave does not reverse its polarity and is non-alternating
4. A dc offset sine wave
Case 2: If Vdc < Vp
Sine wave is negative during certain portion of its lower half-cycle and is alternating
