From the image header and 3 would wangboriwen at the end of a bar magnet does not have a horizontal arrangement of a RASP the iron powder! Magnetic force line can be written as 4 images 4 images from where A and B have no magnetic force to lean on over! If the compass is at, it is found that the compass rotate. These points show that the magnetic force line against all such points, the name that the point is half and half (the Natural point.)
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