Suggest a way to wind the wire around the spool so that the current does not create a magnetic field. Where is this winding used in practice?

To create a coil, the current in which does not create a magnetic field, a bifilar winding is used. A piece of wire is folded in half and wound on a coil, as a result of which the magnetic fields of the opposite parts of the winding are the same in magnitude and opposite in direction. In practice, such winding is used for non-inductive wirewound resistors.

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