Oscillation Frequency for Peak Voltage

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Homework Help Overview

The discussion revolves around determining the oscillation frequency related to peak voltage in a context involving electromagnetic principles. The original poster presents a problem statement that includes an equation for maximum electromotive force (E(max)) and attempts to solve for frequency (f) while grappling with the unknown variable N, which represents the number of turns in a wire loop.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to manipulate the equation for E(max) to isolate frequency but expresses uncertainty regarding the value of N. Some participants question the interpretation of N and its relevance to the problem setup.

Discussion Status

Participants are exploring the implications of the variable N, with some suggesting that it may be defined within the problem statement. Guidance has been offered regarding the interpretation of N as the number of turns in the wire loop, indicating a potential direction for the original poster's reasoning.

Contextual Notes

The problem context includes a specific mention of a "loop of wire," which may influence the understanding of N's value. There is an emphasis on deriving equations from fundamental principles rather than relying solely on memorized results.

4Phreal
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Homework Statement



Here is the prompt:

http://i.imgur.com/GsZck8J.jpg


Homework Equations



E(max) = NABw = 2pi*NABf

The Attempt at a Solution



E(max) = NABw = 2pi*NABf
= NA*B(nought)*2pi*f
1.50 / (NA*B(nought)*2pi) = f
f = 1.50 / N / ((2.50/100)^2*pi) / 0.109 / (2pi)

The problem I'm having is I don't know how to figure out N because it is not given, and I don't know any other equations that exclude the N variable.
 
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I suspect they have told you what N is.
What does N stand for in that equation?
 
N is the number of turns, and I suppose since this isn't a solenoid that N=1
 
That's the one - the problem statement specifically says "A loop of wire..." - that would be 1.

You could also have got there by applying the Laws of electromagnetism instead of trying to memorize specific results. Then you'd just derive an equation that never has an N in it... you'd feel more confident about the result too, but it would take a lot longer ;)
 

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