Two long straight wires cross each other at right angles, and
the horizontal wire carries 2 I (capital i ) Amp and vertical wire
carries one I Amp. Assume ABC and D are equal distance L from both
vertical and horizontal wires. Calculate B field in term of I and L
and other fundamental constants at each of the points ABC and D due
to the two wires.
( for some reason I am having trouble uploading the figure.. If you need the figure I can probably try to describe it.. Just comment)
so the top left of the square is "A" ; bottom left is "B" ; bottom right is "C" and top right is "D"
on the horizontal,, there should be an arrow pointing to the right which has a value of 2I and on the vertical axis there should be an arrow pointing upward that has a value of I. L would be the distance from the the vertical and horizontal wires. (so on each quadrant, the horizontal and vertical lines from the partial square would have a label "L")