Multiplate Capacitors

Chapter 3.15 Multiplate Capacitors

Fundamental Electrical and Electronic Principles Third Edition Book
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Fundamental Electrical and Electronic Principles Third Edition Book

  • Electric Fields and Capacitors 95 (d) QV CBCDBDBCD(see Figs and )C36355020006..1111 and this will be the charge on both the 3 F and 6 F capacitors, i.e. QQVQCVBCCDBCBCBCBC11110003033 3346CThus voltso .VV Ans 3.15 Multiplate Capacitors Most practical capacitors consist of more than one pair of parallel plates, and in these cases they are referred to as multiplate capacitors. The sets of plates are often interleaved as shown in Fig. 3.19 . The example illustrated has a total of fi ve plates. It may be seen that this effectively forms four identical capacitors, in which the three inner plates are common to the two ‘ inner ’ capacitors. Since all the positive plates are joined together, and so too are the negative plates, then this arrangement is equivalent to four identical capacitors connected in parallel, as shown in Fig. 3.20 . The total capacitance of four identical capacitors connected in parallel is simply four times the capacitance of one of them. Thus, this value will be the effective capacitance of the complete capacitor.The capacitance between one adjacent pair of plates will be CAd1εεorfarad Fig. 3.19