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magnets

QuestionAnswer
An electric current that reverses direction in a circuit at regular intervals. Alternating current
A luminous atmospheric phenomenon appearing as streamers or bands of light sometimes visible in the night sky in northern or southern regions of the earth. aurora
An electric current flowing in one direction only. direct current
A magnet consisting essentially of a coil of insulated wire wrapped around a soft iron core that is magnetized only when current flows through the wire. electromagnet
device used to increase or decrease the voltage of an alternating current transformer
group of atoms whose fields point in the same direction magnetic domain
surrounds a magnet and exerts a magnetic force on other magnets magnetic field
region of space affected by Earth's magnetic field magnetosphere
device that transforms electrical energy into kinetic energy motor
a material that has no resistance superconductor
a magnetized needle that points north or south to the earth. compass
the ends of a magnet poles
a unit that tell much energy does a current have. voltage
generator
Created by: dino65