Register to reply

Solving for Magnetic Field Strength given Induced voltage in a coil

by under_par_00
Tags: coil, field, induced, magnetic, solving, strength, voltage
Share this thread:
under_par_00
#1
Nov7-08, 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?
Phys.Org News Partner Science news on Phys.org
New type of solar concentrator desn't block the view
Researchers demonstrate ultra low-field nuclear magnetic resonance using Earth's magnetic field
Asian inventions dominate energy storage systems
under_par_00
#2
Nov8-08, 02:16 PM
P: 16
can anyone help?


Register to reply

Related Discussions
A coil with turns given magnetic field, time find the emf induced in the coil Introductory Physics Homework 4
Positron movement in a coil-induced magnetic field Introductory Physics Homework 4
A Coil in a uniform magnetic field. Induced emf. Introductory Physics Homework 0
Magnetic Flux and Induced EMF in a Coil Introductory Physics Homework 6
Induced Voltage in a coil Introductory Physics Homework 2