A disk of radius R = 8 cm is charged with a charge q = 300 nC uniformly distributed over the surface. The disk rotates uniformly with a frequency n = 10 rev/s relative to an axis perpendicular to the plane of the disk and passing through its center. Determine: 1) magnetic moment pm of the circular current created by the disk; 2) the ratio of the magnetic moment to the angular momentum pм/L, if the mass m of the disk is 80 g.
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