(Solved): Find an expression for the capacitance per meter of a coaxial cable. Assume t ...

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Find an expression for the capacitance per meter of a coaxial cable. Assume that the insulating material between the cylinders is air. High-frequency signals are oflen transmilted albng a Express your answer in terms of the given quantities and constants $$?$$ and $$?0$$ coaxial cabie, such as the one shown in the figure! Flgure 1). For example, the cable TV hookup coming into your home is a coaxial cable. The signal is carried on a wire of radius $$R_1$$ while the outer conductor of radius $$R_2$$ is grounded (i.e., at $$V=0V$$ ). An insulating material fills the space between them, and an insulating plastic conating goes around the outside. Figure Evaluate the capacitance per meter of a cable having $$R_1=0.40\mathrm{mm}$$ and $$R_2=3.0\mathrm{mum}$$. Express your answer using two significant figures.