What is the magnetic force on a square circuit with side a in which a current I circulates and with two of its opposite sides parallel to a straight infinite cable on which the same current circulates and the closest side is at a distance d. Consider the current direction of the straight wire in the two possible orientations.

What is the magnetic force on a square circuit with side a in which a current I circulates and with two of its opposite sides parallel to a straight infinite cable on which the same current circulates and the closest side is at a distance d. Consider the current direction of the straight wire in the two possible orientations.

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