26. Capacitors & Dielectrics
Combining Capacitors in Series & Parallel
7:12 minutes
Problem 24.81
Textbook Question
Textbook QuestionA multilayer “film” capacitor has a maximum voltage rating of 100 V and a capacitance of 1.0 μF. It is made from alternating sheets of very thin metal foil connected together, separated by films of polyester dielectric. The sheets are 12.0 mm by 14.0 mm and the total thickness of the capacitor is 6.0 mm (not counting the thickness of the insulator on the outside). The metal foils are actually very thin layers of metal deposited directly on the dielectric, so most of the thickness of the capacitor is due to the dielectric. The dielectric strength of the polyester is about 30 x 10⁶ V/m. Estimate the dielectric constant of the polyester material in the capacitor.
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