the electromagnetic field interacts with the permanent magnet generating a force, which pushes the cone outwards the current is made to flow in the opposite direction the direction of the ...

This article was originally published with the title “ Powerful Electromagnet for the Use of Oculists ” in Scientific American Magazine Vol. 105 No. 26 (December 1911), p. 573 doi:10.1038 ...

Magnetic fields - CCEA Electromagnets. Magnetism and electromagnetism occur because of the magnetic fields around magnets and around electric currents.