A permanent magnet is a type of magnet that retains its magnetism over a long period of time without the need for an external power source. It can attract certain materials, like iron and steel, and create a magnetic field.
Sentences with «permanent magnet»
In the long run they could contribute to the development of permanent magnets with improved magnetic performance. (sciencedaily.com)
The two electric motors are the first in the world to use permanent magnets that require no heavy rare - earth metals. (hybridcars.com)
Good point, though in my case it is indeed permanent magnets - it's an old tractor without many of the modern features. (mechanics.stackexchange.com)