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EDEXCEL NATIONAL CERTIFICATE/DIPLOMA UNIT …
1 EDEXCEL NATIONAL CERTIFICATE/DIPLOMA unit 5 - electrical AND ELECTRONIC PRINCIPLES NQF LEVEL 3 OUTCOME 4 - ALTERNATING CURRENT 4 Understand single-phase alternating current (ac) theory Single phase AC circuit theory: waveform characteristics sinusoidal and non-sinusoidal waveforms, amplitude, period time, frequency, instantaneous, peak/peak-to-peak, root mean square ( ), average values, form factor; determination of values using phasor and algebraic representation of alternating quantities graphical and phasor addition of two sinusoidal voltages, reactance and impedance of pure R, L and C components ac circuit measurements: safe use of an oscilloscope eg setting, handling, health and safety; measurements (periodic time, frequency, amplitude, peak/peak-to-peak, and average values); circuits half and full wave rectifiers 2 1. REVISION OF BASIC THEORY SINUSOIDAL WAVE FORMS A pure alternating current or voltage varies with time sinusoidally as shown.
© d.j.dunn www.freestudy.co.uk 1 edexcel national certificate/diploma unit 5 - electrical and electronic principles nqf level 3 outcome 4 - alternating current
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