Hi, I have a question about magnetic field lines in a motor-like situation. Suppose I have two horizontal bar magnets, with one north end parallel to x=-X and one south end parallel to x=X, as here:

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N | | S

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(forget the 'as here', the board is stripping out my nice spacing...)

If I have one or more current-carrying wires in the intervening space (not near the poles), can I still be sure that the magnetic field line from (-X,y) will end at (X,y)? In my model, this isn't happening, but I'm not sure if this is due to numerical error, some other error in the model, or whether it's actually expected real-life behaviour. I've made every correction I can think of to the line integration, and the lines are still warping significantly.

Thanks

-- --

| |

| |

N | | S

| |

| |

-- --

(forget the 'as here', the board is stripping out my nice spacing...)

If I have one or more current-carrying wires in the intervening space (not near the poles), can I still be sure that the magnetic field line from (-X,y) will end at (X,y)? In my model, this isn't happening, but I'm not sure if this is due to numerical error, some other error in the model, or whether it's actually expected real-life behaviour. I've made every correction I can think of to the line integration, and the lines are still warping significantly.

Thanks

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