33. Wire coil radius R = 25 centimeters is located in the plane of the magnetic meridian. In the center with a small magnetic needle that can rotate around a vertical axis. At what angle α deviates hand, if the round to put on a current of I = 15 A? The horizontal component of the earth's magnetic field induction to take in equal = 20 mT.

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