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final review Blank - Electromagnetics Workshop Final Review...

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Electromagnetics Workshop – Final Review Problem 1: A cylindrical capacitor with inner radius a and outer radius b is filled with an inhomogeneous dielectric having 0 k ε ρ = , where k is a constant. Calculate the capacitance per unit length of the capacitor. 1
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Problem 2: The cross-sectional view of an air-filled coaxial capacitor with spacers made out of material with permittivity ε is shown in the figure below. (a) Find the capacitance per unit length of this coaxial line in terms of ε , a , b , and φ . (b) If the spacers are to be made out of mica ( 29 0 6 ε = , determine the angle such that only 10% of the total energy stored by the capacitor is stored in the spacers. (c) Consider the capacitor without the spacers (i.e. 0 = ). For a given potential difference 0 V between the inner and outer conductors and for a given fixed value of b , determine the inner radius a for which the largest value of the electric field is a minimum. 2
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This note was uploaded on 10/25/2011 for the course ECE 2317 taught by Professor Staff during the Fall '08 term at University of Houston.

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final review Blank - Electromagnetics Workshop Final Review...

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