Chapter 25, Problem 020 The figure shows a variable "air gap capactor of the type used...
The figure shows a variable “air gap” capacitor of the type used in manually tuned radios. Alternate plates are connected together; one group of plates is fixed in position, and the other group is capable of rotation. Consider a capacitor of n = 8 plates of alternating polarity, each plate having area A = 1.96 cm2 and separated from adjacent plates by distance d = 4.60 mm. What is the maximum capacitance of the device? Number Units