Physics
High School (11–12)
Electricity & Magnetism › Alternating CurrentChapter 21Contains Standard contentAlternating Current
The socket at home gives a voltage that swings between plus and minus fifty times every second, and the whole country runs on it. Alternating current behaves differently from steady current in resistors, coils and capacitors. In this chapter you learn rms values, phasors, series LCR circuits and resonance, power and the power factor, and why the transformer lets power travel far. Python plots a voltage and the current it drives.
Part of Physics · High School (11–12) (chapter 21)
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AC Voltage and Simple AC Circuits
A voltage that changes with time. Peak and rms values, an AC voltage across a resistor, an inductor and a capacitor, reactance, and phasors that show the phase between voltage and current.
Series LCR Circuits and Resonance
The three parts together. The series LCR circuit, impedance and phase, resonance and the quality factor, average power in an AC circuit and the power factor.