Induced current in a square coil by a current-carrying wire

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SUMMARY

The discussion centers on the concept of induced current in a square coil due to a nearby current-carrying wire. The participant correctly identifies that the magnetic field generated by the wire influences the flux through the coil, specifically noting the cancellation of fields in opposing directions. The analysis concludes that as the current in the wire decreases, a positive magnetic field contributes to the total flux, resulting in an induced electromotive force (EMF) and a counter-clockwise current in the coil, in accordance with Faraday's Law of Induction.

PREREQUISITES
  • Understanding of Faraday's Law of Induction
  • Familiarity with magnetic fields and flux concepts
  • Knowledge of current-carrying conductors and their effects on nearby coils
  • Basic principles of electromagnetism
NEXT STEPS
  • Study the mathematical formulation of Faraday's Law of Induction
  • Explore the relationship between magnetic field strength and induced EMF
  • Investigate the effects of varying current on induced currents in coils
  • Learn about applications of induced currents in electrical engineering
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Students of physics, electrical engineers, and anyone interested in the principles of electromagnetism and their applications in circuit design.

greg_rack
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Homework Statement
Consider the situation below.
The wire carries a current ##I(t)## decreasing with time, in the direction ##-\hat{y}##. In which direction is the induced current moving in the conductive square coil?
Relevant Equations
Faraday-Neumann-Lenz's law
IMG_1245.jpg
I'll try to explain to you my thinking behind this problem... tell me if it's correct or not.
In short, I have assumed the area enclosed between the wire and the left side of the coil to be ##A## in which is present a ##-\hat{z}## field, and noticed that the flux it generates must be canceled by that in the ##+\hat{z}## direction present immediately at the right of the wire, enclosed in the same ##A## area.
Now, all we are "left" with, is the area to the very right of the coil, with a ##+\hat{z}## decreasing(since ##I## is decreasing) field which contributes to the total flux of the coil; for FNL's law, this will create an induced EMF and hence a current in the counter-clockwise direction.

Am I correct?
 
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Yes, that's correct. Your analysis is very good.
 
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TSny said:
Yes, that's correct. Your analysis is very good.
That's great, thank you very much!
 
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