Induced EMF Moving Current Loop

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SUMMARY

The discussion centers on the concept of induced electromotive force (EMF) in a moving current loop, specifically addressing the confusion surrounding the negative sign in the curl calculation. The curl of the magnetic field is computed as -10v0 &hat;k, and the direction of the normal surface is taken as -&hat;k. This alignment indicates that the negative sign in the solution cancels out, confirming that the current flows clockwise despite the line integral being counter-clockwise. The clarification provided resolves the misunderstanding regarding the directionality of the current flow.

PREREQUISITES
  • Understanding of electromagnetic theory, specifically Faraday's Law of Induction.
  • Familiarity with vector calculus, particularly the concept of curl.
  • Knowledge of line integrals in the context of electromagnetism.
  • Basic principles of current flow in circuits and their directional implications.
NEXT STEPS
  • Study Faraday's Law of Induction in detail to grasp induced EMF concepts.
  • Learn about vector calculus operations, focusing on curl and divergence.
  • Research line integrals and their applications in electromagnetic fields.
  • Explore the implications of current directionality in circuit analysis.
USEFUL FOR

Students and professionals in physics, electrical engineering, and anyone studying electromagnetic theory, particularly those dealing with induced EMF and current loop dynamics.

jegues
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Homework Statement



See figure attached.

Homework Equations





The Attempt at a Solution



I'm having some confusion about the negative sign within this problem.

If you compute the curl of the expression shown in the figure you'll find that it's equal to,

[tex]-10v_{0} \hat{k}[/tex]

But if we take the direction of the normal of the surface to be

[tex]-\hat{k}[/tex]

so it points in the same direction that negative sign in his solution should go away, correct?
 

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In the problem they tell you the line integral is in the counter-clockwise direction, the minus sign just means the current flows clockwise.

Hope this helps.
 
Spinnor said:
In the problem they tell you the line integral is in the counter-clockwise direction, the minus sign just means the current flows clockwise.

Hope this helps.

Sorry I misunderstood your comment.

This is more clear now.
 

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