Two bar magnets rest end to end on a bench with a short gap between them. The right-hand end of the left magnet is a N pole and the left-hand end of the rig...
Question 1 Report
Two bar magnets rest end to end on a bench with a short gap between them. The right-hand end of the left magnet is a N pole and the left-hand end of the right magnet is a S pole. Curved field lines link the two ends across the gap. What is the force between these ends? 
Answer Details
The right-hand end of the left magnet is a N pole, and the left-hand end of the right magnet is a S pole. A N pole and a S pole are unlike poles, so they attract each other. The curved field lines linking the two ends in the diagram show the field running from the N pole to the S pole across the gap, which is the characteristic pattern of attraction.
Like poles (N-N or S-S) repel, but unlike poles (N-S) always attract. The field lines between attracting poles curve smoothly from one magnet to the other, whereas between repelling poles the field lines push outward and a neutral point may form between them.
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