4_Electromagnetism0910

4_Electromagnetism0910 - loops, the domains in the iron...

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1 ELECTROMAGNETS Ch. 37 Electric Current Produces Magnetism s Moving charge produces magnetic field. s Many charges in motion (electric current) also produces magnetic field. s As charged particles (electrons) move through wire, a magnetic field is created around that wire. Electric Current Produces a Magnetic Field s Right Hand Rule (magnetic field) Electric Current Produces Magnetism s If a current carrying wire is bent into a loop, the magnetic field lines become concentrated inside the loop.
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2 Electromagnets s If an iron core is placed at the center of the
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Unformatted text preview: loops, the domains in the iron will align with the magnetic field, creating an electromagnet. Electromagnets Strength of an Electromagnet s Number of coils s Current s Thickness of core s Distance from wire/coil How is strength affected? s Number of Coils more coils, stronger b Double the coils, double the strength s Current more current, stronger b Double current, double the strength s Distance farther distance, weaker (1/d 2 ) b Double distance, the strength...
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4_Electromagnetism0910 - loops, the domains in the iron...

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