P11 The period of small oscillations of a small magnetic dipole in the magnetic field of Earth is To. If we place and fix another identical magnetic dipole at position A, the period of oscillations of the first dipole becomes TA. Find the period Tg of the oscilla- tions of the first dipole if the second dipole is placed and fixed at position B (instead of position A). The north pole of the magnets is the darker one.

P11 The period of small oscillations of a small magnetic dipole in the magnetic field of Earth is To. If we place and fix another identical magnetic dipole at position A, the period of oscillations of the first dipole becomes TA. Find the period Tg of the oscilla- tions of the first dipole if the second dipole is placed and fixed at position B (instead of position A). The north pole of the magnets is the darker one.