Question

Suppose you have two magnets. Magnet A doesn't have its poles labeled, but Magnet B does have a clearly labeled north and south pole. If these two are brought into contact with one another, which of the following could you expect? 
A. The side of Magnet A that's repelled by Magnet B's south pole must be Magnet A's north pole.

B. The side of Magnet A that's repelled by Magnet B's north pole must be Magnet A's south pole.

C. The side of Magnet A that's attracted to Magnet B's south pole must be Magnet A's north pole.

D. The side of Magnet A that's attracted to Magnet B's north pole must be Magnet A's north pole.

Answer 1

The opposite pole attracts each other and the similar pole repel each other. Which means only C is true.

Answer 2

Before going to answer this question first we have to know the fundamental principle of magnetism.

A magnet have two poles .The important characteristic of a magnet is that like poles will repel each other while unlike poles will attract each other.

Through this concept the question can be answered  as explained below-

A-As per first option the side of  magnet A is repelled by the south pole  of magnet B. Hence the pole of a must be south .It can't be north as it will lead to attraction.

B-The side of magnet A is repelled by the  north pole of magnet B. Hence the side of A must be  north pole.It can't be a south pole.

C-The side of magnet A is attracted by the south pole  of magnet  B .Hence the side of magnet A must be north.Hence this is right

D-The side of magnet A is attracted by the north pole of magnet B. Hence the side of A must south.It can't be north as it will lead to repulsion.

Hence the option C is right.