- #36
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The tensions will change direction, if that's what you are thinking. The endpoints of the circuit are assumed fixed so that one can analyze the forces. When the current changes direction, the magnetic force will change direction and you will have the same force diagram as in post #11 except that will be reflected 180o about the horizontal axis passing through the endpoints (dashed line in post ##11). In other words, the tensions will reverse their perpendicular components to the dashed line, but not their parallel components. In the end, the entire loop will still be under tension except "upside down" in a sense.