Two bar magnets are labeled A and B. The ends of each magnet are numbered 1 or 2, but the poles are not labeled. When A1 is brought near B1, the bars repel.
Answer
A
A1 is the north pole of a magnet, and B1 is the south pole of a magnet.
B
A1 is the north pole of a magnet, and B1 is the north pole of a magnet.
C
A1 and B1 are opposite poles, but there is not enough information to tell which ones.
D
A1 and B1 are like poles, but there is not enough information to tell whether they are north poles or south poles.