What this chapter is about
Direct current (DC) flows in one direction with constant voltage. Alternating current (AC) voltage varies sinusoidally with time, causing current to periodically reverse direction. Most electrical energy generated, transmitted, and distributed globally is AC power. AC voltage can be easily transformed to different levels using transformers, making it ideal for long-distance transmission with minimal losses. This chapter explores AC circuit theory, circuit elements in AC, and power relationships.
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Learning objectives
- 1Explain aC Circuits, Impedance, Resonance, and Power in AC Systems
- 2Explain sINUSOIDAL AC VOLTAGE AND CURRENT
- 3Explain basic AC Voltage
- 4Explain rMS (Effective) Value
- 5Explain phase Relationships
- 6Explain aC CIRCUIT ELEMENTS
Your learning path
Key terms
PowerPower factorAverage powerPhase differenceCurrent and voltageImpedanceBandwidthAdvantagesPhase angleAt resonanceReactive powerApparent powerPower dissipationResonance frequencyPower factor correctionPhasor
Connected chapters
33Concepts
49Formulae
11Minutes