Chapter 14: Magnetism
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36 Terms
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Turbine
________: a large wheel that rotates when pushed by water, wind, or steam.
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Power Plants
________ commonly produce alternating current because the voltage can be increased or decreased with transformers.
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electricity
There is a relationship between ________ and magnetism.
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Transformer
________: a device that increases or decreases the voltage of an alternating current.
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Battery
The ________ produces the current that makes the coil an electromagnet.
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Solenoid
A(n) ________ wrapped around an iron core forms an electromagnet.
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Generator
________: uses electromagnetic induction to transform mechanical energy into electrical energy.
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Electromagnet
A(n) ________ is made from a current- carrying wire.
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Simple-Electric Motor
In a(n) ________, a coil rotates between the poles of a permanent magnet.
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Electromagnetic Induction
________: The generation of a current by a changing magnetic field.
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Electrons
________ have magnetic properties.
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Galvanometers
________: devices that use an electromagnet to measure electric current.
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Electrical Energy
The electromagnet in a speaker converts ________ into mechanical energy to produce sound.
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Coil
The ________ in a generator is rotated by an outside source of mechanical energy.
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Flexible Speaker
The sound is produced by a loudspeaker that contains an electromagnet connected to a(n) ________ cone that is usually made from paper, plastic, or metal.
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Primary Coil
The voltage in the ________ is the input voltage, and the voltage in the secondary coil is the output voltage.
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Magnets
________ can be found in many devices you use every day, such as TVs, video games, and telephones.
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Electric Motor
________: a device that changes electrical energy into mechanical energy.
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Transformers
________ can increase or decrease voltage.
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Electromagnets
________: a temporary magnet made by wrapping a wire coil carrying a current around an iron core.
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Solenoid
________: A single wire wrapped into a cylindrical wire coil.
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power plants
Some ________ first produce thermal energy by burning fossil fuels or using the heat produced by nuclear reactions.
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Transformer
A(n) ________ that increases the voltage so that the output voltage is greater than the input voltage is a step- up ________.
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Magnetism
refers to the properties and interactions of magnets
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Magnetic Field
exerts a force on other magnets and objects made of magnetic materials
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Magnetic Poles
where the magnetic force exerted by the magnet is strongest
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Magnetic Domains
The groups of atoms with aligned magnetic poles
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Electromagnets
a temporary magnet made by wrapping a wire coil carrying a current around an iron core
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Solenoid
A single wire wrapped into a cylindrical wire coil
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Galvanometers
devices that use an electromagnet to measure electric current
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Electric Motor
a device that changes electrical energy into mechanical energy
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Electromagnetic Induction
The generation of a current by a changing magnetic field
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Generator
uses electromagnetic induction to transform mechanical energy into electrical energy
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Turbine
a large wheel that rotates when pushed by water, wind, or steam
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Direct Current
flows only in one direction through a wire
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Alternating Current
reverses the direction of the current in a regular pattern
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