Electrical Engineering › Section J · Series, parallel, and series-parallel ac circuits › Topic J.1
Impedance, phasor diagrams, and series ac circuits
Once every resistor, inductor and capacitor is described by a single complex number of ohms, an ac circuit can be solved with the same Ohm's law, series rules and voltage divider you used for dc. This topic builds that number, impedance, and puts it to work on series circuits.
In this topic
- From reactance to impedance
- Impedance of R, L and C
- Worked example: an inductor on its own
- The impedance diagram
- Series ac circuits
- Worked example: a series R-L-C circuit
- Phasor diagrams and power factor
- The voltage divider rule
- Worked example: an R-C divider
- Common mistakes to avoid
- Key takeaways
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