You are given the following data for the Measurement of a Capacitance experiment, where C,: The capacitance of the standard capacitor, D,: The deflection of the standard capacitor, D;: The deflection of the unknown capacitor. C, = 10 µF D, (uA) D. (HA) 21 37 Fi 19 43 23 46 = Then, determine the capacitance of the unknown capacitor Cr. 0.5 µF b. 2 µF OC. 20 uF Od. 5 µF 10 uF TOSHIBA INS F12 B/0 $ & V 8 A 9. 6. R * TY Y ! U P. i J F I GYH J > V BYN IM

1.3 A coaxial cylindrical capacitor is to be designed with an effective length of 10 cm. The capacitor is expected to have a capacitance of 100 pF and to operate at 11 kV, 1000 kHz. Determine the required thickness if the required insulating material is Polytetrafluoroethylene (P.T.F.E.), &r= 2.0, Eb = 250 kV/cm. Allow a factor of safety of 4 and take to = 8.85x10-1² F/m.

9) A capacitor energy storage system is used with a fixed-speed wind generator system to provide smoothed power to the customers. Calculate the energy stored in the capacitor having an area of the plate 5 cmX5cm and the distance between the plates of the capacitor is 5 cm. Assume the voltage across the capacitor is 6,000V and the permittivity of the dielectric is 8.85X10- 4 F/m.

For the previous question, estimate the capacitance per unit length (pF).