Electromagnetism, Magnetism
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| Define electromagnetism. | show 🗑
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| show | That a magnetic field always surrounds a conductor in which a current is flowing.
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| Define helix. | show 🗑
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| show | Helix with electric current flowing through it.
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| show | A solenoid with an iron core inside it.
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| What are the four factors that regulate the strength of induced current under the The First Law of Electromagnetics? | show 🗑
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| show | Induction of an opposing emf in a single coil by its own changing magnetic field.
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| show | Inducing current flow through SECONDARY coil by passing varying current through primary coil.
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| show | Ability of certain materials to attract iron, cobalt, nickel.
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| What are the 3 classes of magnets? | show 🗑
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| show | Earth, Lodestone
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| Name an example of a artificial permanent magnet. | show 🗑
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| What are the 3 Laws of Magnetism? | show 🗑
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| show | Zone of influence.
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| Define magnetic permeability. | show 🗑
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| show | Ability of magnet to resist demagnetization.
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| show | High, low
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| Hard iron has __ permeability, __ retentivity. | show 🗑
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| What are the 4 magnetic classes of matter? | show 🗑
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| show | Iron, Cobalt, nickel
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| Give an example of paramagnetic materials. | show 🗑
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| Give examples of nonmagnetic materials. | show 🗑
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| Give examples of diamagnetic materials. | show 🗑
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| show | Unaffected by a magnetic field.
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| show | Weakly repelled from both poles of magnetic field.
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| show | Weakly attracted to both poles of magnetic field.
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| show | Can be strongly magnetized.
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| show | SPEED that a conductor cuts magnetic lines of force.
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| Name one of four factors that determine electromagnetic induction. | show 🗑
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| show | ANGLE between conductor and direction of magnetic field.
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| Name one of four factors that determine electromagnetic induction. | show 🗑
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| show | Device that converts electrical energy into mechanical energy.
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| show | Commutator rings
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| What type of rings does an AC motor use? | show 🗑
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| What are the 2 major types of AC motors? | show 🗑
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| show | Consists of pairs of stationary magnets arranged around the rotor.
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| Name an example of an electromagnet. | show 🗑
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| show | Supplied by AC, built like single-phase AC generator. Speed must be synchronous with speed of generator.
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| show | Has stator with even number of electromagnets. Has rotor in middle.
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| What is an electric generator? | show 🗑
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| show | An accumulation of many atomic magnets with their dipoles aligned.
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| Define magnetic susceptibility. | show 🗑
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| Magnetic field | show 🗑
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| T/F: A magnetic field exists around a wire only while an electric current is flowing. | show 🗑
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| Ammeter | show 🗑
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| show | 1st coil through which varying current is passed.
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| Secondary coil | show 🗑
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| show | Outside, Within
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| Generator | show 🗑
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| Define motor. | show 🗑
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| show | DC
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| What type of current does a dynamometer use? | show 🗑
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| show | Meter connected in series that measures amps
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| Voltmeter | show 🗑
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| T/F: Autotransformers are not suitable for use in high-voltage transformers in x-ray machines. | show 🗑
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| show | To vary incoming-line voltage to an appropriate level for high-voltage step-up transformers.
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| show | To raise the incoming-line voltage to the kilovoltage range necessary for x-ray production.
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| show | To decrease the incoming-line voltage to 5-15 volt range used to heat the x-ray tube filament.
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| show | Current
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| show | Decreases
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| Maximum induction will occur when a conductor cuts a magnetic field at what angle? | show 🗑
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| show | An emf is induced
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Created by:
rad1958tech
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