Solution: The variable capacitance of an old radio tuner
Chapter 24, Problem 24.85(choose chapter or problem)
The variable capacitance of an old radio tuner consists of fourplates connected together placed alternately between fourother plates, also connected together(Fig. 24-36). Each plate is separatedfrom its neighbor by 1.6 mm of air.One set of plates can move so that rvthe area of overlap of each plate I rvaries from 2.0 cm2 to 9.0 cm2.(a) Are these seven capacitorsconnected in series or in parallel?(b) Determine the range of capacitancevalues. \ \FIGURE 24-36 85 and 86.
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