(a) Consider a section of a standard co-axial cable, such as RG-11. The diameter of the central conductor is d and that of the very thin metallic shield is D. The insulation between the central conductor and the shield forms a capacitance. Consider a cylindrical shell of the insulation of that section with radius, r, length h, infinitesimally small thickness dr, from the central axis of the cable. The capacitance of this very thin shell is given by dC = 2πrch/dr where & is the permittivity of the insulation. Derive the total capacitance per unit length, C, of the cable. (

(a) Consider a section of a standard co-axial cable, such as RG-11. The diameter of the central conductor is d and that of the very thin metallic shield is D. The insulation between the central conductor and the shield forms a capacitance. Consider a cylindrical shell of the insulation of that section with radius, r, length h, infinitesimally small thickness dr, from the central axis of the cable. The capacitance of this very thin shell is given by dC = 2πrch/dr where & is the permittivity of the insulation. Derive the total capacitance per unit length, C, of the cable. (

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.27P

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