21. The current waveform depicted in Fig. 2.27 is characterized by a period of 8 s. (a) What is the average value of the current over a single period? (b) If q (0) = 0, sketch q(t), 0
21. The current waveform depicted in Fig. 2.27 is characterized by a period of 8 s. (a) What is the average value of the current over a single period? (b) If q (0) = 0, sketch q(t), 0
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Transcribed Image Text:21. The current waveform depicted in Fig. 2.27 is characterized by a period of 8 s.
(a) What is the average value of the current over a single period? (b) If
q (0) = 0, sketch q(t), 0 < t < 20 s.
i(t)
12-
10-
8.
2.
→t (s)
4
5.
8.
9 10 11 12 13 14 15
FIGURE 2.27 An example of a time-varying current.
4.
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