Observe the picture A and B, is it true that in A, cars 1 and 2 will come closer to each other and in B, 3 and 4 will move away from each other?

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Detailed Solution

The above statement is True.
In the case of figure A, cars 1 and 2 will come closer to each other, whereas in B, 3 and 4 will move away from each other. Opposite poles attract each other, and the same poles repel each other as in case A, magnets on cars 1 and 2 are facing each other with opposite poles, and the cars will be attracted.
When two magnets are brought together, the like poles will repel one another, and the opposite poles will attract one another. This is similar to electric charges. Like charges repel, and unlike charges attract. Since a free-hanging magnet will always face north, magnets have long been used for finding direction.

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