Week 12 · Chapter 4 Alternating Current Circuits (A): the sine waveform, frequency (50 Hz in Egypt) and the advantages of AC, why a moving-coil ammeter fails and the hot-wire ammeter, voltage and current in a resistor (in phase) and in a coil (voltage leads by 90°), inductive reactance XL = 2πfL, coils in series and parallel · 3 lessons
