Question

A parallel-plate capacitor is made from two aluminum-foil sheets, each 5.6cm wide and 5.0m long. Between the sheets is a Teflon strip of the same width and length that is 4.5

Answer 1

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A parallel-plate capacitor is made from two aluminum foil sheets, each 6.3 cm wide and 5.4 m long. Between the sheets is a Teflon strip of the same width and length and that is 0.035 mm thick. What is the capacitance of this capacitor? (The dielectric constant of Teflon in 2.1)   

The parallel plate capacitors with adielectric is C = k ?₀ A /d

                       where A is the area of the parallel plate A = 0.063 m * 5.4m

                                                                                                      = 0.340 m²

                                                           distance d = 0.035 *10^-3 m  

                                                     C = 2.1 * 8.85 *10^-12 * 0.340 / 0.035 *10^-3 m

                                                         = 180 .5 *10^-9 F