Magnetism and Electromagnetism The Final Chapter Flashcards
What was the name for naturally occurring magnetic rock called in Greek Times
Lodestone
What is the name for naturally occurring magnetic rock called now
Magnite
What is Ferromagnatism
Substance that is naturally or permanently magnetic
What is Para magnetic magnatism
Materials which are attracted to magnetic fields and can retain magnetism properties for a short time
What is Diamagnatism
Repelled by a magnetic field
What are crystals divided up into
Crystallites or grains
What are Grains
The grains are regions within the crystal latices that are misaligned with respect to one another
What are domains
Regions of atoms with their magnetic fields aligned in the same direction
Who discovered magnetism and electric currents had something in common
Hans Oersted (1812)
Who came up with the mathematical formula for what Hans had discovered
Andre-Marrie Ampere
WHAT IS AMPERE’S LAW
A current carrying wire produces a magnetic field around it and with the strength of the magnetic field is directly proportional to the current carrying wire
What are brushes
Contact Points on the axle
What is Brush less DC stand for
BLDC
What is an Electromagnet
An electric current which produces a magnetic field which can be turned on and off