PHYS208 Fundamentals of Physics II

Special Assignment #2 on Capacitance

a. Find an expression for the capacitance per unit length of the twinax cable shown. Your answer should be expressed in pF/m.

This cable consists of two long, parallel conductors (radius 0.50 mm), separated by a distance of 8.0 mm by polyethylene dielectric (2.25). You may suppress the presence of the dielectric in your analysis until we complete our investigation of dielectric materials.

[twinax cable]

This cable is known as twinax and was commonly seen as the lead-in transmission line for television antennas before the advent of "cable."

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Last updated Sept. 29, 1997.
Copyright George Watson, Univ. of Delaware, 1997.