Question

A parallel-plate capacitor is made of two plates, 100 mm times 100 mm in size, separated by a distance of 1 mm, as shown in Figure 5. There are three layers of insulation between the two plate conductors. The first layer is a rubber (epsilon_r = 4.0), the next layer is a plastic (epsilon_r = 9.0), and the third layer is a foam (epsilon_r = 1.5). The thicknesses of the rubber, plastic and foam layers are 0.2 mm, 0.6 mm, and 0.2 mm, respectively. Calculate the capacitance of the device.

Answer 1

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