To find the resistance of the specified aluminum conductor, you must use the formula: R = ρa * l / S.
Constants and variables: ρa – beats. electrical resistance of aluminum (at a temperature of 20 ºС ρa = 0.028 Ohm * mm2 / m); l is the length of the specified conductor (l = 1 m); S – cross-sectional area (S = 4 mm2).
Calculation: R = ρa * l / S = 0.028 * 1/4 = 0.007 Ohm = 7 mOhm.
Answer: The resistance of the specified aluminum conductor is 7 mΩ.
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.