chapter 21

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  1. a current carrying a wire wrapped around an iron core.
    electromagnet
  2. a device that converts electric energy into kinetic energy.
    motor
  3. northern lights. collision of atoms that are ejected from the sun cause the atoms to emit light.
    aurora
  4. _______uses a magnetic field to turn motion into electricity.
    generator
  5. a current that alternates from positive to negative.
    alternating current
  6. when electrons flow in one direction it is called an _______ ________.
    electric current
  7. a device that changes the voltage of an alternating current before transmitting the current.
    transformer
  8. a field that surrounds all magnets.
    magnetic field
  9. a group of atoms with magnetic fields all facing one direction.
    magnetic domain
  10. an atmosphere around the earth that deflects most of the sun's harmful charged particles.
    magnetosphere
Author:
Anonymous
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75201
Card Set:
chapter 21
Updated:
2011-03-25 19:14:38
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Description:
Magnetism vocab
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