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Calibrating instruments…
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Current that changes direction — reactance, resonance and the transformer.
Alternating current turns a simple wire into a circuit with rhythm. Spin a coil in a field to generate a sinusoidal EMF, watch a capacitor and an inductor fight the changing current with reactance, tune a series LCR circuit until it rings at resonance, and step a voltage up or down with a transformer — all driven by honest sinusoids and phasors, with RMS and peak values read live.
Beyond the open showcase, subscribed schools get the growing library of Alternating Current experiments — searchable, tagged by concept and difficulty, and expanding continuously.