Magnetism and the motor effect GapFill

A magnetic field flows from a north pole to a south pole. A magnetic field line shows the direction in which  both polesa protona magnetic materiala north polean electrona south pole would feel a force. Only some materials are attracted to a magnet, such as  copper and aluminiummagnesium and manganesegold and silverhydrogen and heliumiron and nickelcarbon and oxygen.
Some magnets produce their own magnetic field all the time; these are known as  solenoidinducedmotorpermanenthorseshoebar magnets. Others only become magnetic when placed in a magnetic field; these are known as  inducedhorseshoemotorpermanentbarsolenoid magnets.
A wire carrying a current produces a magnetic field; the magnetic field lines  point directly out of the wiremove in circles around the wire at certain pointspoint directly into the wireflow from one end of the wire to the othermove in circles around the wire, along its entire lengthrun parallel along the length of the wire.  A solenoidAn electromagnetA permanent magnetA transformerAn induced magnetA permanent magnet is a current-carrying wire wrapped into a long coil, so that the magnetic field lines are in the same shape as those for a bar magnet;  adding another coiladding an iron core in the middlecoating the wire in plasticincreasing the currentreversing the direction of the currentincreasing the number of coils turns this into an electromagnet and increases the strength of the magnetic field produced.