Induced EMF in Non-Uniform Magnetic Field

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SUMMARY

The discussion focuses on calculating the induced electromotive force (emf) in a square wire loop subjected to a non-uniform magnetic field. The loop, with dimensions of 15.5 cm, moves at a speed of 4.55 m/s through a magnetic field of 0.855 T. Key equations utilized include E = Blv for induced emf and the force on a charge in a magnetic field, F = q(v × B). Participants emphasize the importance of understanding the polarity of induced charges and the relationship between magnetic flux and induced emf.

PREREQUISITES
  • Understanding of Faraday's Law of Electromagnetic Induction
  • Familiarity with the concept of magnetic flux
  • Knowledge of the Lorentz force equation, F = q(v × B)
  • Basic principles of electromotive force (emf) in moving conductors
NEXT STEPS
  • Study the derivation of Faraday's Law of Induction
  • Learn about the relationship between magnetic flux and induced emf
  • Explore the concept of motional emf in different geometries
  • Investigate the effects of magnetic field orientation on induced emf
USEFUL FOR

Students and educators in physics, electrical engineers, and anyone interested in understanding electromagnetic induction and its applications in circuits and devices.

  • #31
haha i know, but i don't really know how i got it. i just kinda guessed because all else failed. it doesn't make sense to me... half was in the + B-field and half was in the - B-field I would just think that they'd cancel out and it would equal 0.
 
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  • #32
The flux through the loop is indeed 0, but the emf doesn't depend on the flux but on the rate of change of the flux. That's what you need to calculate.
 
  • #33
does it have anything to do with how that person was talking abour charges? like how the left side say wants to pull more to the left and the right side wants to pull more towards the right and so that puts twice the change on it ?
 
  • #34
hello, what is the difference between the flux density of air gap and iron in magnetic circuit.
let say i have an iron ring with an air gap of 1mm. do the air gap and iron ring produce the same magnitude of flux density and flux.
 

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