Calculation of the DC resistance of an electrical cable
The Lineres function calculation of the DC resistance of an electrical cable. The parameters for the length l and the cross-sectional area A can be real numbers or lists of real numbers.
The third argument is the specific resistance. The value can be transferred as a real number or as a text string with the element symbols "Al" (silver), "Cu" (copper) or "Fe" (iron).
Lineres (l, A, R)
Lineres (l, A, "Cu")
l Length in meter A cross-sectional area in mm2 R specific resistance in Ohm
R=Lineres(30, 1.5, 1/56)=357.1mΩ
R=Lineres(30, 1.5, "Cu")=357.1mΩ
\(\displaystyle R_L=\frac{l}{A}ρ\)
A table with specific resistances of different materials can be found here
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