The coil is a coil surrounding the thousands. There are usually wrapped around the magnetic axis and the light coating of insulation, so a magnetic poles when there is electrical current flow through the.
The coil is wrapped around the coil. Usually wrapped around a core of soft magnetic insulation coating. So when there is current flowing through the magnetic poles.
The coil by the thousands around a coil. Usually wrapped around the core soft magnet coated insulation. To make the magnetic pole when the electricity goes through.