Why does heating a magnet weaken it?

Answer 1

Magnetism occurs when the atoms in a magnetic metal (usually iron or steel) are lined up in the same direction, forming poles. It is the fact that all of these atoms have common orientation that gives the material its magnetic properties.
When you heat the magnet, you add energy. This causes some of the atoms to vibrate until they go out of alignment. The fewer atoms that are aligned, the less strength the magnet has.
An easy way to re-polarize a magnet is by running a high current electrical pulse through it. Just remember to respect polarity. (This works in a theoretical sense. I am not actually advocating playing with high currents.)

note: an easier way to dis-align the atoms is to drop the magnet. This also messes up the polarity

Answer 2

Heating A Magnet

Answer 3

Heating the magnet increases the vibrational energy and thus the aligning of the domains gets weakened and hence the magnetic field gets weakened. When it is heated above the Curie temperature, the magnetism disappears totally.

Answer 4

It breaks the bond of the molecules, so that they are no longer aligned north and south. some of them realign randomly which weakens the magnet.

Answer 5

wen a magnet is heated or dropped the weber elements' arrangement gets distorted so the loss of magnetic properties occurs

Answer 6

it causes movement and vibration, and the magnet's domains get misaligned. Thus, its magnetic field is weaker.

magnets only work when its domains are aligned