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Physical Science

Chpt 11 vocab for final

TermDefinition
Hans Oersted noticed that the current carrying wire had produced a magnetic field
William Gilbert wrote a book on magnetism and brought the study of magnetism into the realm of science
Greeks found lodestones which are natural magnets
Petrus de Mericourt found the two poles of magnets
Chinese developed working compasses for navigation
Paramagnetic a weak magnetic material
Solenoid a coil wire that acts like a magnet
Stator ring of coils surrounding the rotor
Ferromagnetic a strong magnetic material
Domain large groups of magnetic dipoles at the particle level
Rotor prime mover
Permanent Magnet a ferromagnetic material that contains enough aligned magnetic domains to give it a lasting magnetic character
Dipoles the two poles on a magnet
Lines of Force they show how the magnet is responding to the magnetic poles; they point away from the north pole and toward the south pole
Law of Magnetism opposite magnetic poles attract and like magnetic poles repel
Alternating Current the process of when a north pole passes by a coil, creating induction and a current in one direction and when a south pole passes, the current flows in the opposite direction
Direct Current current goes in one direction
Curie Temperature the temperature above which a permanent magnet loses its ferromagnetic properties
Created by: Giraffe Girl