A bar magnet is broken in half. The magnetic field around one piece is sketched. What is wrong with this sketch

This question is incomplete

Explanation:

This question is incomplete. However, there are some common mistakes students make while drawing an "half magnet" or a "broken magnet".

It is well known that magnets have two poles; North pole and the South pole. If a magnet (for instance a bar magnet) gets broken, each broken part will automatically have both a north and south pole of it's own and hence if a sketch shows the broken magnet to each have different poles (that is if one part has just the north pole and/or the other part has just the south pole), then that's the problem with the sketch.

Also, if lines are drawn to show the magnetic field, the lines must come from the north pole and move (denoted with a pointed arrow) to the south pole, if the sketch has it the other way round, that is another thing that can make the sketch wrong.

The sketch must also not depict two similar poles attracting as unlike poles are the ones that attract while the like poles repel.

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explanation:

wavelength divides in half and speed stays the same.