Determine the resistance of a nickel wire 200m long and a cross-sectional area of 0.2mm ^ 2.
| September 19, 2021 | education
Initial data: l (the length of a given nickel wire) = 200 m; S (cross-sectional area) = 0.2 mm2.
Reference values: ρ (specific resistance of nickel at t = 20 ºС) = 0.4 Ohm * mm2 / m.
The resistance of a given nickelin wire can be calculated using the formula: R = ρ * l / S.
Calculation: R = 0.4 * 200 / 0.2 = 400 Ohm.
Answer: The given nickel wire has a resistance of 400 ohms.
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