The specific electrical resistance of copper is 0.017 μOhm * m. What is the electrical resistance of a copper wire with a cross-sectional area of 1 mm2 and a length of 100 m?
These tasks: S (cross-sectional area of the taken copper wire) = 1 mm2; l (wire length) = 100 m.
Reference values: according to the condition ρm (specific electrical resistance of copper) = 0.017 μOhm * m2 / m or 0.017 Ohm * mm2 / m.
The required electrical resistance of the taken copper wire can be calculated by the formula: R = ρm * l / S.
Calculation: R = 0.017 * 100/1 = 1.7 Ohm.
Answer: The resistance of the wire taken is 1.7 ohms.
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