However permanent magnets maintain their strength as they are scaled down in size, and it is often advantageous to design magnetic systems that use the interaction between an electromagnet and a permanent magnet.
(permanent magnets; maintain; their strength) (they; are scaled; down) (it; is; T:often; advantageous to design magnetic systems) (it; to design; magnetic systems that use the interaction between an electromagnet and a permanent magnet) (magnetic systems; use; the interaction between an electromagnet and a permanent magnet)
permanent magnets they it it magnetic systems
maintain are scaled is to design use
their strength
down
T:often advantageous to design magnetic systems
magnetic systems that use the interaction between an electromagnet and a permanent magnet
the interaction between an electromagnet and a permanent magnet