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Alternating Currents

Cambridge A Level Physics (9702) · 4 topics

Characteristics of an alternating current

Characteristics of an alternating current Alternating e.m.f. and potential difference Definitions: Alternating Current (a.c.): A current that periodically…
Power transferred by an alternating current

Power transferred by an alternating current Derivation of Mean Power Key Concept Mean Current: The average value of a sinusoidal current is zero because the…
Measurement of alternating quantities

Measurement of alternating quantities Different instruments measure different values: Ammeters and Voltmeters: Calibrated to read r.m.s. values. Oscilloscope…
Rectification and smoothing

Rectification and smoothing Rectification: The process of converting Alternating Current (a.c.) into Direct Current (d.c.). Half-wave rectification Diagram:…