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chapter 21
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a current carrying a wire wrapped around an iron core.
electromagnet
a device that converts electric energy into kinetic energy.
motor
northern lights. collision of atoms that are ejected from the sun cause the atoms to emit light.
aurora
_______uses a magnetic field to turn motion into electricity.
generator
a current that alternates from positive to negative.
alternating current
when electrons flow in one direction it is called an _______ ________.
electric current
a device that changes the voltage of an alternating current before transmitting the current.
transformer
a field that surrounds all magnets.
magnetic field
a group of atoms with magnetic fields all facing one direction.
magnetic domain
an atmosphere around the earth that deflects most of the sun's harmful charged particles.
magnetosphere
Author
Anonymous
ID
75201
Card Set
chapter 21
Description
Magnetism vocab
Updated
2011-03-25T19:14:38Z
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