42. Under a horizontal straight conductor with current I 1 = 8.0 A at a distance of l = 1.5 cm is parallel to the straight aluminum wire with a current I2 = 1,0 A. In a cross-sectional area S of aluminum wire, he kept loose ? aluminum density ρ = 2,7 g / cm3.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)