The wire is 120 m long and has a cross-sectional area of 0.5 mm squared and has a resistance
| March 27, 2021 | education
The wire is 120 m long and has a cross-sectional area of 0.5 mm squared and has a resistance of 96 ohms. What material is the wire made of?
Data: l (length of the taken wire) = 120 m; S (cross-sectional area) = 0.5 mm2; R (resistance) = 96 ohms.
To find the material of the wire taken, we calculate its electrical resistivity and compare it with the table value: R = ρ * l / S and ρ = R * S / l.
Calculation: ρ = 96 * 0.5 / 120 = 0.4 Ohm * mm2 / m.
Answer: The wire taken was made of nickel.
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