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14 Cards in this Set
- Front
- Back
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magnetic field
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the region around the magnet where magnetic forces act.
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ammeters
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measure the elctrical current passing through a circuit in amperes and should be connected in series with circuit.
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electromagnetic induction
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the process by which moving a wire through a magnetic feild produces a current.
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alternating current (AC)
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reverses its direction in a regular pattern.
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magnetism
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a property of matter in which there is a force of attraction or repulsion between unlike or like poles.
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magnetic domains
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groups of atoms with aligned magnetic poles.
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voltmeters
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measure the potential difference of a circuit in volts.
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generator
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produces electric current by rotating a loop of wire in a magnetic field.
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transformer
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can increase or decrease the coltage of an alternating current.
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magnetic poles
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the magnetic forces are strongest near these ends.
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electromagnet
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when an iron core is inserted into such a coil and a current is passed through the coil this is formed.
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electric motor
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a device that changes electrical energy into mechanical energy.
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direct current (DC)
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flows only in one direction through a wire.
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superconductor
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materials that have no electrical resistance.
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