Задача 30315.

A thin wire in the form of a ring with a mass m = 5 g is freely suspended on an inelastic thread in a uniform magnetic field. A current with a force of I=6A flows through the ring. The period T of small torsional vibrations relative to the vertical axis is 2.2 s. Find the magnetic field induction.

Detailed solution with a brief record of the conditions, formulas and laws used in the solution, derivation of the calculation formula and answer.
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