Magnetic Field at center of a Square loop

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SUMMARY

The discussion focuses on calculating the magnetic field at the center of a square wire loop with a side length of 12.0 cm carrying a clockwise current of 15.0 A. The participant initially used the equation B = (μ0*I)/(4π)*(2a)/(x√(x^2+a^2)) to compute the magnetic field, resulting in an incorrect value of 1.41*10^-4 T. The error arose from misunderstanding the vector nature of magnetic fields, as the contributions from each wire segment cannot simply be added as scalars. The Biot-Savart Law is referenced as the correct approach for determining the magnetic field due to current elements.

PREREQUISITES
  • Understanding of the Biot-Savart Law for magnetic field calculations
  • Knowledge of vector addition in physics, particularly for magnetic fields
  • Familiarity with the concept of magnetic fields generated by current-carrying conductors
  • Basic proficiency in using SI units for physical quantities
NEXT STEPS
  • Study the Biot-Savart Law in detail to understand its application in magnetic field calculations
  • Learn about vector addition of magnetic fields and the implications of directionality
  • Explore examples of magnetic field calculations for different geometries, including circular and rectangular loops
  • Review the principles of electromagnetism related to current-carrying conductors
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Students studying electromagnetism, physics educators, and anyone interested in understanding magnetic fields generated by current-carrying loops.

Elvis 123456789
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Homework Statement


A square wire loop 12.0 cm on each side carries a clockwise current of 15.0 A

Find the magnitude of the magnetic field at its center due to the four 1.30 −mm wire segments at the midpoint of each side.

Homework Equations


B = (μ0*I)/(4π)*(2a)/(x√(x^2+a^2))

The Attempt at a Solution


I used the above equation for magnetic field at the center of the square loop due to one wire and then multiplied it by 4 since the contribution due to each wire segment is the same by symmetry.

B = 4*(4π*10^-7*15)/(4π)*(2*0.06)/(0.06*√(0.06^2+0.06^2))

B = 1.41*10^-4 T

This answer is wrong and I don't know why
 
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Elvis 123456789 said:
I used the above equation for magnetic field at the center of the square loop due to one wire and then multiplied it by 4 since the contribution due to each wire segment is the same by symmetry.

are you permitted to add them like scalars -as they are magnetic field vectors and their addition-rules are different.
 
drvrm said:
are you permitted to add them like scalars -as they are magnetic field vectors and their addition-rules are different.
As far as i know, the contributions from each wire are equal and in the same direction, so i can add them.
 
Elvis 123456789 said:
As far as i know, the contributions from each wire are equal and in the same direction, so i can add them.

You might have heared about Biot-Savart Law for calculating the B field due to current element -or see a reference to see the direction of the field.
Ref.http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magcur.html
 
drvrm said:
You might have heared about Biot-Savart Law for calculating the B field due to current element -or see a reference to see the direction of the field.
Ref.http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magcur.html
Yes, I used the law from scratch to end up with the result that I have. My problem is that I don't know where I am going wrong.
 
Elvis 123456789 said:
Yes, I used the law from scratch to end up with the result that I have. My problem is that I don't know where I am going wrong.

Elvis 123456789 said:
A square wire loop 12.0 cm on each side carries a clockwise current of 15.0 A

Find the magnitude of the magnetic field at its center due to the four 1.30 −mm wire segments at the midpoint of each side.

what is in your opinion the correct answer should be and how it differs from your calculation.?
 
drvrm said:
what is in your opinion the correct answer should be and how it differs from your calculation.?
I already figured out how to do the problem. No offense, but none of your replies helped in any way, at all. This isn't me trying to come at you in any way. I just found your replies to be either not relevant to the question, or just really vague like your last reply. Thanks for trying to help anyways though.
 

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