What is the specific resistance of aluminum?

The specific resistance, also known as resistivity, of aluminum is typically around 2.82 x 10^-8 ohm-meters at 20°C, which translates to about 17.0 ohm-circular mils per foot. This property of aluminum is important in electrical applications, especially for linemen working with conductors, as it determines how much the material resists the flow of electric current.

Understanding the resistivity of materials like aluminum can help linemen choose the appropriate materials for wiring and connections in electrical systems, optimizing performance and minimizing energy loss. Aluminium is favored in many applications due to its relatively low resistivity compared to other materials like copper, making it a popular choice for overhead power lines. The other options do not align with the standard resistivity values associated with aluminum, hence they are not considered correct.