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Solving for Magnetic Field Strength given Induced voltage in a coil 
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#1
Nov708, 03:24 PM

P: 16

1. The problem statement, all variables and given/known data
This is part of a lab I did, I am working on the writeup now. We placed a coil of wire inside of a Helmholtz pair, with 20V of 60Hz AC through the Helmholtz pair. The coil inside was connected to an oscilloscope and the induced voltages were recorded. I now need to solve for the strength of the magnetic field as the coil was moved along the axis of the Helmholtz pair. 2. Relevant equations Period = 1/frequency T=1/f Faraday's Law emf = d/dt (magnetic flux) 3. The attempt at a solution Faraday's Law: emf = dB/dt * 2*pi*N*r^2 (area is constant, N is number of loops, B is changing) dB = emf/(2*pi*r^2) *dt integrate both sides B = emf/(2*pi*r^2*f) (f is frequency of current through the Helmholtz pair) Is this correct? Can I do this? 


#2
Nov808, 02:16 PM

P: 16

can anyone help?



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