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 mm ^{2}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