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ContentโMaxwell's Equations
Maxwell's Equations
In steady state with stationary net charge and constant current, the Maxwell's equations becomes
Inward/Outword Pointing Fields:
Inward/Outward through closed surface and Curly through boundary of open surface are independent field configurations in constant steady state.
Faraday's LawThe Faraday's law is
Therefore Faraday's law can also be defined as emf=โ๐ฮฆmag๐๐กwhere โ sign means that loops of wire oppose changes in the enclosed or net magnetic flux. Curly ๐ธ from Moving a Loop of WireIn the presence of a perpendicular field, changing the area of a loop of wire causes a motional emf.Curly ๐ธ from Changing ๐ตMoving the loop of wire away from or toward the magnet causes a current to run.Lenz's LawThe direction of curly electric field depends on the direction of magnetic field ๐ตext and the rate of changes of magnetic field with โ๐ตext=๐ตext,finalโ๐ตext,initial. The right hand rule still applies to ๐ธNC because the โ sign is already added to indicate that the loop opposes changes in magnetic flux.For top-left example: ๐ตext is positive and ๐ตext is increasing imply โ ๐๐ตext๐๐กis pointing backward, โ(+(+)), and by right-hand rule, ๐ธNC is clockwise. For top-right example: ๐ตext is positive and ๐ตext is decreasing imply โ ๐๐ตext๐๐กis pointing forward, โ(โ(+)), and by right-hand rule, ๐ธNC is counterclockwise. For bottom-left example: ๐ตext is negative and ๐ตext is increasing imply โ ๐๐ตext๐๐กis pointing forward, โ(+(โ)), and by right-hand rule, ๐ธNC is counterclockwise. For bottom-right example: ๐ตext is negative and ๐ตext is decreasing imply โ ๐๐ตext๐๐กis pointing forward, โ(โ(โ)), and by right-hand rule, ๐ธNC is clockwise. And the lenz's Law: A loop of wire tends to oppose changes of magnetic flux through it. And top-left is easier to remember. Source and Referencehttps://www.youtube.com/watch?v=BlPctmU1VUg&list=PLZ6kagz8q0bvxaUKCe2RRvU_h7wtNNxxi&index=24ยฉsideway ID: 200102902 Last Updated: 1/29/2020 Revision: 0 Latest Updated Links
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