How does a magnetized needle work?

Answer 1

The magnetic field of earth exerts a torque on the needle, pulling one end or pole of the needle toward the Earth's North magnetic pole, and the other toward the South magnetic. The needle is mounted on a low-friction pivot point, in better magnetized needle a jewel bearing, so it can turn easily. When the magnetized needle is held level, the needle turns until, after a few seconds to allow oscillations to die out, one end points toward the North magnetic pole.

Answer 2

A magnetized needle aligns itself with Earth's magnetic field, pointing towards the magnetic North Pole. This allows for a simple and reliable method of navigation, particularly in situations where other tools may not be available. The magnetized needle retains its orientation as long as it is not disturbed by other magnetic fields.