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mccormick magnets
Chapter 18 sect 1 and sect 2
Question | Answer |
---|---|
compass | a device which uses a magnetic needle that can turn freely to determine direction |
magnetic field | surrounds a magnet and exerts a magnetic force on other magnets |
magnetic domain | group of atoms whose fields point in the same direction |
magnetosphere | region of space affected by Earth's magnetic field |
electromagnet | magnet created by wrapping a current-carrying wire around an iron core |
motor | device that transforms electrical energy into kinetic energy |
generator | device that uses a magnetic field to turn kinetic energy into electrical energy |
alternating current | (AC) electric current that changes its direction repeatedly |
direct current | (DC) electric current that flows only in one direction |
transformer | device used to increase or decrease the voltage of an alternating current |