Solve Biot-Savart's Law Homework: Magnetic Field Intensity in P

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Homework Help Overview

The discussion revolves around calculating the magnetic field intensity at point P using Biot-Savart's law. The original poster is seeking clarification on the arrangement of supplying wires to avoid influencing the magnetic field at point P, given specific parameters such as distance and current.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • Participants are examining the configuration of the wires and questioning the contribution of different segments to the magnetic field. There are inquiries about the original diagram and its implications on the calculations.

Discussion Status

The discussion is ongoing, with participants exploring the implications of wire arrangement on the magnetic field. Some guidance has been offered regarding the non-contributing segment and its relevance to the overall setup, but no consensus has been reached on the original poster's solution or the tutor's grading.

Contextual Notes

There is mention of an attachment containing a diagram, which may provide additional context. The original poster expresses confusion regarding the tutor's feedback and the completeness of the problem statement.

Baydith
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Homework Statement



Calculate magnetic field intensity in point P using Biot-Savart's law. How should the supplying wires be arranged so that they would not influence field in P point? a=0.2m,i=10A

Homework Equations



Biot Savart's law

img884.png

The Attempt at a Solution



In the attachment.

The tutor graded my work for only 3 (that is C), whereas I don't quite understand why. Could anyone tell me what was wrong with my solution?

Thanks in advance!
 

Attachments

  • pic_biot_savart.jpg
    pic_biot_savart.jpg
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  • biot_savart.pdf
    biot_savart.pdf
    497.9 KB · Views: 307
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Isn't segment 2 supposed to be a circular arc? Do you have a scan of the original diagram?
 
The scan is in the attachment, it is linear, therefore from the equation, this segment does not contribute to the magnetic field. However, I'm wondering how to place all the wires that they would not contribute to the magnetic field...
 
Baydith said:
The scan is in the attachment, it is linear, therefore from the equation, this segment does not contribute to the magnetic field. However, I'm wondering how to place all the wires that they would not contribute to the magnetic field...
From your work, you seem to have more information than was shown on the problem statement. Where did that all come from?

I didn't check your work closely, but I didn't see any obvious errors. Have you asked your tutor for clarification?

As far as the arrangement of the supply wires goes, think about the fact you have one segment that doesn't contribute to the magnetic field at P. Why doesn't it? How can you apply that concept to the supply wires?
 

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