whn heat is applied 2 magnet y does it gets demagnetised
2006-09-30 20:55:53 · 6 answers · asked by chocki 1 in Education & Reference ➔ Other - Education
When a piece of iron is magnetised, the randomely scattered iron molecules have been induced to get aligned in a straight line, [like soldiers standing smartly in a straight line], which gives the magnetic iron special properties of attracting other magnetic materials.
Heat disturbs this temporary process and breaks this alignment, by which the magnetic property get lost/weakened. On the other hand, when the magnet is cooled lower and lower to cryogenic temperatures, the magnetism becomes stronger!
2006-09-30 21:08:04 · answer #1 · answered by thegentle Indian 7 · 1⤊ 0⤋
I think the heat energy distores the magnetic field as the magnet heats up the field get weaker and weaker eventually demagnetising the magnet. Energy has to go somewhere as you know it can't be created nor destroyed.
2006-09-30 22:43:54 · answer #2 · answered by 0v3rc|0k3d_M4ch!n3_2151 1 · 0⤊ 0⤋
One way I believe would be to bring it to a very high temperature, then the particular magnetic quantums that constitute the magnetic effect will depolarize and disappear. At a certain temperature the ferromagnetic properties (strong magnetic properties) of substances such as iron or cobalt disappear, and something else takes its place such as ferrimagnetism of something like that, which is a much weaker form of magnetism. Other forms exist such as paramagnetism and diamagetism - diamagnetism is actually a form of anti-magnetism where the lines of magnetic force are reflected back - superconductors may exhibit something known as *perfect* diamagnetism, where the field lines are *completely* reflected back - this explains the phenomena of levitating magnets over superconductors, because such perfect field reflection allows the levitating magnet to "see" its mirror image in the superconductor as that superconductor is acting as a magnetic mirror, so the levitation results from like repelling identically like. . .
2016-03-27 00:38:40 · answer #3 · answered by Anonymous · 0⤊ 0⤋
The domains in the magnet get jumbled due to the heat.
Same thing happens when you store a lot of magnets together in a box.
2006-09-30 21:36:25 · answer #4 · answered by Catwoman 1 · 0⤊ 0⤋
Friend ! If you were a LITTLE Scientific, you'd realise that You Have To Arrange the Atoms and Its Electrons + Positrons + Protons with SOME ENERGY, To Make It Behave In A Special Manner. Please Think Scientifically and MORE Will Come In.
2006-09-30 21:10:21 · answer #5 · answered by Anonymous · 0⤊ 1⤋
dont know
2006-10-03 04:51:11 · answer #6 · answered by Anonymous · 1⤊ 0⤋