When the north pole of a strong magnet is brought near to the north pole of a weak magnet then they will :

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First, attract and then repel

First, repel and then attract

Attract each other

Repel each other

answer is A.

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Detailed Solution

As we know the like poles of a magnet repel each other, that's why the north pole of a strong magnet repels the weak pole of the weak magnet from distance.
But It attracts each other after it brought close together, It happens because of the phenomenon of magnetic induction.
According to this phenomenon, if any weak magnet is brought near the strong magnet, then strong magnets have a tendency to reverse the poles of the weaker magnets.
So, The north pole of the strong magnet induces a weak south pole on the weak magnet. That's why it attracts a weak magnet.

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