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a) Determine the capacitance of a Teflon-filled parallel-plate capacitor having a plate area of 1.60 cm2 and a plate separation of 0.020 0 mm.

_________________ pF

(b) Determine the maximum potential difference that can be applied to a Teflon-filled parallel-plate capacitor having a plate area of 1.60 cm2 and a plate separation of 0.020 0 mm.

_________________ kV

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\varepsilon _{r} = 2.1, \varepsilon = 8.85X10^{-12}

C=\varepsilon _{r} \varepsilon A/d

A = 1.60 cm2 = 0.000160 m2

d = 0.020 0 mm = 0.00002 m

C = 146.68 pF

-------------------

Dielectric strength of Extruded Teflon is 6x107 V/m = Em,

so, maximum voltage = Em * d = 6x107 V/m x 0.00002 m = 1.2x103 V = 1200 V

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