What you’ll learn4 learning objectivesChoose one objective for a focused lesson, or study the complete topic.21.1.1The terms period, frequency and peak value as applied to an alternating• understand and use the terms period, frequency and peak value as applied to an alternating current or voltageSyllabus objective21.1.2Equations of the form x = x0 sin ωt representing a sinusoidally alternating• use equations of the form x = x0 sin ωt representing a sinusoidally alternating current or voltageSyllabus objective21.1.3The fact that the mean power in a resistive load is half the maximum power• recall and use the fact that the mean power in a resistive load is half the maximum power for a sinusoidal alternating currentSyllabus objective21.1.4Root-mean-square (r.m.s.) and peak values and recall and use I r.m.s. = I0 /• distinguish between root-mean-square (r.m.s.) and peak values and recall and use I r.m.s. = I0 / sqrt(2) and Vr.m.s. = V0 / sqrt(2) for a sinusoidal alternating currentSyllabus objective