Magnetic Field in a Single Current Coil

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Discussion Overview

The discussion revolves around the magnetic field generated by a single current loop, particularly focusing on the derivation of the magnetic field at various points within and around the loop. Participants explore methods for calculating the magnetic field, including the use of the Biot-Savart law and the challenges associated with the resulting integrals.

Discussion Character

  • Exploratory
  • Technical explanation
  • Mathematical reasoning

Main Points Raised

  • One participant seeks a derivation of the magnetic field at any point within a single loop of current, noting the complexity of the integral involved.
  • Another participant suggests using the Biot-Savart law as a potential method for solving the problem.
  • A different participant acknowledges the difficulty of the integral obtained from the Biot-Savart law and questions whether there might be a more efficient approach.
  • One participant humorously suggests defining the integral as a function named after oneself, while also mentioning that the integral may relate to elliptic integrals.
  • A link to an external resource is provided, which may contain relevant information regarding the magnetic field calculations for a loop.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the best method for solving the integral related to the magnetic field of a single current loop, indicating that multiple approaches and challenges remain in the discussion.

Contextual Notes

The discussion highlights the complexity of the integrals involved and the potential reliance on elliptic integrals, which may not be straightforward to resolve. Specific assumptions or definitions related to the magnetic field calculations are not fully articulated.

opsb
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I understand that the magnetic field in a solenoid can be approximated as being constant as the length of the solenoid tends to infinity, but I was wondering if anyone could show me or point me in the direction of a derivation of the precise magnetic field at any point within a single loop of current. The magnetic field at any point along an axis perpendicular to the coil running through its centre can be determined, is there a solution to the field at any point in the plane of the coil. I wrote the problem down and got an integral that looked pretty hard, and I couldn't figure out a way to solve it. Any help would be appreciated.
Thanks.
 
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Did you try the biot-savart law ? It might work
 
I did, but you get this really tricky integral. I was wondering if there might be a smarter way to do it than brute force.
 
When you run into a difficult integral: just use it to define a function and name it after yourself!

Although in this case it seems to be elliptic integrals, which are already taken :-)

Did you get the same as this?:

http://www.netdenizen.com/emagnet/offaxis/iloopoffaxis.htm"
 
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