Basic magnetism on square loop question?

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SUMMARY

A square loop carrying a current I generates a magnetic field that influences the forces on each side of the loop. The Biot-Savart Law is essential for calculating the magnetic field (B) at any point due to the current in the loop, where B = (μ₀I)/(2πR). For a square loop, the distance R used in calculations must be the perpendicular distance from the point of interest to the segment of the loop contributing to the field. Integration over the loop's sides is necessary to accurately determine the total magnetic field and the resulting torque experienced by the loop.

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A square loop carrying a current I creates its own magnetic field. Describe the forces on each side of the square loop due to its own field. What is the torque it experiences?

My question is this. I know we can use bio savart. But for bio savart, B=uoI/2piR, what R do I use? suppose i have a square loop, the adjacent sides do create B fields that the other experiences, but if they are two consecutive sides, their distance apart is 0? Please someone help me out!
 
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You have to integrate over the lines, using the distance between the point where you want to calculate the field and the point where your integral "is".
 

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