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21 Cards in this Set
- Front
- Back
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Clusters of aligned atoms
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Domains
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A device that puts current in and gets motion out
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Motor
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Power is transmitted at high voltage to minimize this
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Power loss
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Elements that can be magnetic
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Iron, nickel, cobalt
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Current depends on voltage and this
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Resistance
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What unlike poles do
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Attract
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The source of all magnetism
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Moving charges
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The direction of a magnetic field
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North or south
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Surrounds a moving charge
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Magnetic field
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What always surrounds an electric charge
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Electric field
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One way to weaken a magnet
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Heat
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The shape of a magnetic field around a current-carrying wire
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Loops
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What a transformer changes
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Voltage
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A transformer that increases voltage
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Step-up
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Types of devices that have a coil turning inside a magnetic field
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Generators, motors
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A device that puts motion in and gets current out
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Generator
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The amount of induced voltage depends on the number of coils and rate of change of magnetic field
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Faraday's law
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What like poles do
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Repel
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The motion of electrons inside atoms most important to magnetism
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Spin
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A device that changes the voltage
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Transformer
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Difference between true north and magnetic north
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Declination
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