Where Does the N in Faraday's Law of Induction Go?

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SUMMARY

The discussion centers on the application of Faraday's Law of Induction, specifically addressing the role of the number of turns (N) in the equation for electromotive force (EMF). The example provided illustrates a wire moving through a magnetic field, leading to the derivation of EMF as B*A/dt, where B represents magnetic flux density and A is the area. The cancellation of currents and the simplification to a single wire (N=1) is clarified, emphasizing that the number of turns is a variable that can be adjusted based on the scenario presented. The discussion concludes that N is not included in the simplified form when only one wire is considered.

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  • Understanding of Faraday's Law of Induction
  • Familiarity with magnetic flux and its calculation
  • Basic knowledge of electromotive force (EMF) and its derivation
  • Concept of Lenz's Law and its implications
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dbag123
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Hello

Lets take an example: imagine a horizontal magnetic field, then a wire of length L. I push the wire with a force F through the field perpendicularly with respect to the magn. field for a distance of dS.

EMF = work/charge

--> F*dS/I*dt, where F = flux density*current*lenght of conductor

--> Currents cancel each other out and Lenght of conductor multiplied by the distance moved = area

-->we are left with emf in simplified form of B*A/dt, and B*a = the change in magnetic flux
--> also add the minus from lenz's law

My question is Where does the N, or number of turns go?
Thanks
 
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In your example ##N## is the number of wires, you chose ##N=1##.
 
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