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12 Cards in this Set

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Magnetism
refers to the properties and interactions of magnets
Magnetic poles
where the magnetic force exerted by the magnet is the strongest
Magnetic domains
groups of atoms with aligned magnetic poles
Electromagnet
a temporary magnet made by placing a piece of iron inside a current carry coil of wire
Galvanometers
are devices that use an electromagnet to measure electric current
Electric motor
a device that changes electric energy into mechanical energy
Electromagnetic induction
producing an electric current by moving a loop of wire through a magnetic field or moving a magnet through a wire loop
Generator
produces electric current by rotating a coil of wire in a magnetic field
Turbine
a large wheel that rotates when pushed by water, wind or steam
Direct current
flows in only one direction through a wire
Alternating current
reverses the direction of the current flow in a regular
Transformer
a device that increases or decreases the voltage of an alternating current