In catheter resection using a remote magnetic navigation device, the typical size of the external magnetic field is $B=0\mathrm{.}050T.$

Suppose that the permanent magnet of the catheter used in the resection is inside the left atrium of the heart and is affected by this external magnetic fiel

A permanent magnet has a magnetic moment of $0\mathrm{.}20$ Am $2.$

The direction of the permanent magnet is $30$ from the direction of the external magnetic field.