A single-phase overhead transmission line consists of two solid aluminum conductors having a radius of $2.5 mathrm{~cm}$,

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A single-phase overhead transmission line consists of two solid aluminum conductors having a radius of $2.5 \mathrm{~cm}$, with a spacing $3.6 \mathrm{~m}$ between centers. (a) Determine the total line inductance in $\mathrm{mH} / \mathrm{m}$. (b) Given the operating frequency to be $60 \mathrm{~Hz}$, find the total inductive reactance of the line in $\Omega / \mathrm{km}$ and in $\Omega / \mathrm{mi}$. (c) If the spacing is doubled to $7.2 \mathrm{~m}$, how does the reactance change?

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