Determine the specific resistance of a wire with a length of 370 m and a cross-sectional area of 8 mm2

Determine the specific resistance of a wire with a length of 370 m and a cross-sectional area of 8 mm2 if its resistance is 1.3 Ohm.

Initial data: l (wire length) = 370 m; S (cross-sectional area) = 8 mm2; R (taken wire resistance) = 1.3 ohms.

The specific resistance of the material from which the taken wire was made is determined by the formula: R = ρ * l / S, whence ρ = R * S / l.

Calculation: ρ = 1.3 * 8/370 = 0.0281 Ohm * mm2 / m (aluminum).

Answer: The specific resistance of the wire material corresponds to the specific electrical resistance of aluminum (0.028 Ohm * mm2 / m).