(II) Capacitors made from piezoelectric materials
Chapter , Problem 66(choose chapter or problem)
(II) Capacitors made from piezoelectric materials arecommonly used as sound transducers ( speakers ). Theyoften require a large operating voltage. One method forproviding the required voltage is to include the speaker aspart of an LRC circuit as shown in Fig. 30-29, wherethe speaker is modeled electrically as the capacitanceC = 1.0 nF. Take R = 35 0 and L = 55 mH. (a) What isthe resonant frequency / 0 for this circuit? (b) I f the voltagesource has peak amplitude66.V 0 = 2.0 V at frequencyf = fo, find the peakvoltage VCo across thespeaker (i.e., the capacitorC). (c) Determinethe ratio VCo/V q.
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