Oscillation Frequency for Peak Voltage

[4Phreal]

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.

 

[Simon Bridge]

I suspect they have told you what N is.
What does N stand for in that equation?

 

[4Phreal]

N is the number of turns, and I suppose since this isn't a solenoid that N=1

 

[Simon Bridge]

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 ;)