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Basic magnetism on square loop question?

by helpmeplz!
Tags: basic, loop, magnetism, square
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helpmeplz!
#1
Apr30-12, 09:22 PM
P: 24
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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mfb
#2
May1-12, 09:00 AM
Mentor
P: 11,589
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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