At what temperature does demagnetization typically occur?

Demagnetization occurs at the temperature known as the Curie point, which is the temperature at which a magnetic material loses its permanent magnetic properties. This transition is due to the thermal agitation of the atoms surpassing the magnetic ordering, causing the material to become paramagnetic instead of ferromagnetic.

Understanding this concept is vital for anyone involved in electrical engineering, especially in applications related to electromagnetic devices. For instance, if a permanent magnet is subjected to temperatures above its Curie point, it will no longer retain its magnetism, impacting the functionality of motors and generators.

The other options do not accurately describe the specific temperature condition leading to this loss of magnetism. Low operational temperatures and room temperature do not generally induce demagnetization for most magnetic materials, and high operational temperatures might lead to demagnetization but not universally; hence they refer generally to operational conditions rather than the precise point where magnetism is definitively lost.