Conductor resistivity Determine the resistance of a 100 m long aluminum wire with a cross-sectional area of 2.8 mm2.
| May 4, 2021 | education
To determine the resistance value of the taken aluminum wire, we will use the formula: R = ρa * l / S.
Constants and variables: ρa – electrical resistivity (at 20 ºС ρa = 0.028 Ohm * mm2 / m); l is the length of the taken wire (l = 100 m); S – cross-sectional area (S = 2.8 mm2).
Calculation: R = ρa * l / S = 0.028 * 100 / 2.8 = 1 Ohm.
Answer: The aluminum wire, according to the calculation, has a resistance of 1 ohm.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
