Discussion
Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
Answer: B
The north pole of a magnet attracts a piece of iron that is not itself a permanent magnet. The field induces magnetism in the iron, with the near face becoming a south pole, so the two attract.
Two north poles repel each other, and a charged rod carries an electric charge, not a magnetic pole, so a stationary magnet exerts no force on it.
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