A freshly demagnetized bar magnet is placed in the East-West direction to ensure that
the molecular magnets remain randomly arranged.
the molecular magnets are properly aligned
it is affected by the earth's magnetic field
the magnetic domains are within the earth's field
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If a freshly demagnetized bar magnet is placed in the East-West direction, it will align itself with the Earth's magnetic field. The Earth's magnetic field is approximately aligned in the East-West direction, with the magnetic north pole located near the geographic north pole and the magnetic south pole located near the geographic south pole.
The bar magnet is made up of tiny magnetic domains that are randomly oriented when the magnet is demagnetized. When the magnet is placed in the Earth's magnetic field, the magnetic domains will start to align themselves with the Earth's magnetic field. Over time, the domains will align in the same direction, and the bar magnet will become magnetized in the same direction as the Earth's magnetic field.
This alignment occurs because the magnetic field of the Earth exerts a force on the magnetic domains within the bar magnet, causing them to rotate and align with the field. The force is greatest when the bar magnet is oriented in the East-West direction because the Earth's magnetic field lines are also oriented in that direction.
