Find the rms value of the current waveform shown in Figure P4.33.
Analysis:
Think of the problem graphically first. The current must be squared. This squares the maximum amplitude and cuts the period in half. If you redraw the graph after it is squared it from 0 to T, it will consist of 4 identical triangles with a base width of T/4 and a height of 4. The integral of these triangles is the area under the curve. Add up the area of the triangles:
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