
17th November 2009, 02:49 AM
|
 |
Senior Member
|
|
Join Date: Apr 2009
Location: Johannesburg, Sarf Efrika
Posts: 232
|
|
Quote:
Originally Posted by ijkl842
Some ferromagnetic materials can be magnetised by a magnetic field but do not tend to remain magnetised when the field is removed; these are termed soft. Permanent magnets are made from magnetically hard ferromagnetic materials that stay magnetized. solarwaterheaters.cc
|
Please ban this user
__________________
Regards (The mad Sarf Efriken)
|