25. The uniformly charged thin disk of radius R = 50 mm rotates around its axis with angular velocity ω = 70 rad / s. The surface charge density σ = 10 SCLC / m2. Determine the value of the magnetic induction B in the center of the disc and the magnetic moment of the disc pm.

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