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

In summary, the conversation discusses the calculation of EMF in a wire pushed through a magnetic field, with the formula being F*dS/I*dt. It is noted that the currents cancel each other out and the length of the conductor multiplied by the distance moved equals the area. The simplified form of the formula is B*A/dt, with B*a representing the change in magnetic flux. Lenz's law also adds a minus sign. The conversation also addresses the factor of N, or number of turns, which is the number of wires in the example given.
  • #1
dbag123
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3
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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  • #2
In your example ##N## is the number of wires, you chose ##N=1##.
 
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  • #3
Thank you
 

1. What is Faraday's law of induction?

Faraday's law of induction is a fundamental principle in electromagnetism that describes the relationship between a changing magnetic field and an induced electric field. It states that the induced electromotive force (EMF) in a closed loop is directly proportional to the rate of change of the magnetic flux through the loop.

2. Who discovered Faraday's law of induction?

Faraday's law of induction was discovered by English scientist Michael Faraday in the 1830s. He conducted a series of experiments with magnets and coils of wire, and observed that a changing magnetic field could induce an electric current in a nearby wire.

3. How is Faraday's law of induction used in everyday life?

Faraday's law of induction is used in a variety of everyday devices, such as generators, transformers, and electric motors. It is also the principle behind wireless charging technology, where a changing magnetic field is used to induce an electric current in a device.

4. What is the difference between Faraday's law of induction and Lenz's law?

Faraday's law of induction describes the relationship between a changing magnetic field and an induced electric field, while Lenz's law states that the direction of the induced current will always oppose the change that produced it. In other words, Lenz's law is a consequence of Faraday's law of induction.

5. Can Faraday's law of induction be applied to non-closed loops?

No, Faraday's law of induction only applies to closed loops or circuits. This is because the induced EMF in a closed loop creates a current that can flow and produce a magnetic field that opposes the original change in the magnetic field. In an open loop, there is no current to produce this opposing magnetic field, so Faraday's law does not apply.

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