38. In parallel planes at a distance d = 8,0 cm from each other are two coaxial circular coil of radius R = 5,0 cm each. By turns in opposite directions flowing currents I1 = I2 = 2,0 A. Find strength H of the magnetic field at the center of one of the turns.

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