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lloyd21
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Homework Statement
An ideal solenoid is expected to generate a dipole field that falls off quickly as you move away from the solenoid. The magnetic field at distance r along the axis of the solenoid is given by B = (Mo/ 2pie) (M/r^3) In this equation the parameter M is called the dipole moment and it is equal to M = NIA where N is the number of turns, and A
the cross-sectional area of the solenoid.
Calculate the value of the M , knowing that the number of turns in the solenoid you have is 1080 and the corss-sectional diameter is about 7.5 mm. Enter your measurements from the table above into the Logger Pro program and plot B vs r for each side of the solenoid. Then, perform a “variable power” fit of the form Y=AX^n with n set to -3 and identify the value of of the fit parameter A
Using the data you now have determine the value of the permeability of free space MoBe careful with the units
Homework Equations
The Attempt at a Solution
I have;
B= -.020mT = -.000020 T
2(p) = 6.28
M= 1.43x10^-3 Am^2
r = 20mm = 0.020m
fit parameter A = 0.7090
WHERE does the new A be placed ^?
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