Magnetic field strength against current

AI Thread Summary
The discussion revolves around an experiment measuring the relationship between magnetic field strength and current, specifically seeking to understand the significance of the graph's gradient and area under the line. The experimental setup involved a compass and a wire coil with five turns, using the tangent of the angle to represent magnetic field strength. It is noted that the graph's characteristics would differ based on whether the magnetic field is measured outside a wire or within a coil. The magnetic field strength of the Earth is considered an unknown constant in this context. The inquiry highlights the need for clarity on how these variables interact in the experiment.
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Homework Statement


Hi after doing a experiment at school, I have come up with a graph of magnetic field strength against current. I was wondering if anyone knew what the gradent of this line or area under the line represented?


Homework Equations



B=KI/R?

The Attempt at a Solution



googling now to try and find out!

Please Help!
thanks
Matt
 
Physics news on Phys.org
Fingers crossed

Im going to bed now:zzz: , but will have a look in the morning, hopefully to some help:biggrin: !

Thanks
Matt
 
It's hard to say, because you haven't described the experimental setup. The graph would be different for the field outside a wire and the field in a coil, for instance.
 
setup

The set up used was a compass on a support frame with 5 turns of wire around it. We used the tan (theta) to represent the magnetic field strength of the wire as it is directly proportional. The magnetic field strength of the Earth was an unknown constant.
 
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