|Feb21-13, 08:14 PM||#18|
Magnetic field strength dependent on distance from source
I have a practical question to add...
Using a calculator found here: http://hyperphysics.phy-astr.gsu.edu...lenoid.html#c3
I can calculate the magnetic field within a given solenoid. To verify this I have a measured current flowing through the wire and a compass. I align the solenoid at a right angle to the earth's magnetic field and bring the solenoid closer to the compass until it is deflected 45 degrees.
Therefore using vector analysis, I know the field produced by my solenoid at this distance to be equal to the field of the earth at my location (roughly 4.0 x 10-5 Tesla).
To verify the calculated magnetic field strength in my solenoid do I use the a re-arranged version of
N= number of turns
I cannot imagine Bsolenoid=Bat compassr3 would work... The dimensional analysis would leave me with improper units!
Thank you in advance!
|Feb22-13, 06:09 AM||#19|
See here for the magnetic field along the axis of a finite solenoid:
This assumes the solenoid has no iron or other magnetic material inside it.
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