The specific resistance of a high-voltage aluminum cable stretched from Kazan to Almetyevsk is 0.03 Ohm
| September 7, 2021 | education
The specific resistance of a high-voltage aluminum cable stretched from Kazan to Almetyevsk is 0.03 Ohm * mm2 / m. Find the resistance of the conductor if the distance between cities is 260 km and the cross-sectional area of the cable is 1000 mm2.
To find the value of the resistance of the considered high-voltage aluminum cable, we use the formula: R = ρ * l / S.
Constants and variables: ρa – electrical resistivity of the cable (ρ = 0.03 Ohm * mm2 / m); l – cable length, distance between cities (l = 260 km = 260 * 10 ^ 3); S is the cross-sectional area of the cable (S = 1000 mm2).
Calculation: R = ρ * l / S = 0.03 * 260 * 10 ^ 3/1000 = 7.8 Ohm.
Answer: The high voltage aluminum cable in question has a resistance of 7.8 ohms.
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