Question

Which observation can confirm magnetism when comparing bars?

Options

• A twist; it always proves that both bars are magnets.

• Attraction alone; it always confirms magnetism.

• Repulsion; only a magnet can repel another magnet.

• Little or no pull; it always proves that both bars are plain iron.

Answer 1

Attraction alone cannot confirm magnetism because a magnet can attract plain iron. Repulsion is decisive: only a magnet can repel another magnet.