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21 Cards in this Set
- Front
- Back
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magnetic field
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show the strength and direction of magnetic forces
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armature
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the rotating electromagnet in an electric motor
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ferromagnetic
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strongly attracted to magnets
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Curie temperature
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the temperature at which a permanent magnet loses its magnetic field
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step-up transformer
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a series of coils that uses induction to produce a higher voltage
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lines of force
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show the direction the electrical force will move a positive charge
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domains
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microscopic regions of materials that may be lined up to produce a magnetic field of force
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generator
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a device that uses magnetic fields to convert mechanical energy into electrical energy
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ferrimagnetic
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materials like lodestone
(made of two different types of iron ions) |
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direct current (DC)
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an electric current that flows in only one direction
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alternating current(AC)
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an electric current that regularly changes the direction of its flow
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paramagnetic
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slightly attracted to magnets
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step-down transformer
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a series of coils that uses induction to produce a lower voltage
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geographic north pole
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point at the "top of the world" where the axis of the Earth spins
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relay
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a switch used to turn solenoids on or off
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magnetic north pole
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point in Canada where the earth's magnetic flield is concentrated - see geographic north pole
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hertz (Hz)
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the unit of frequency; one cycle per second
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superconducting magnet
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a magnet made from special materials and kept at extremely low temperatures
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solenoids
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coiled wires used to form a magnet
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magnetic poles
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the two areas of concentrated magnetic force on a magnet
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electric field
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the strengths and directions of the electrical force at every point around the electrode
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