Question

Using only two bars, one a magnet and one plain iron, which positioning can help identify the magnet?

Options

• Bring the middle points of both bars together.

• Bring one bar's middle point close to the end of the other bar.

• Cut both bars across their width.

• Place both bars in a uniform field.

Answer 1

Bringing one bar's middle point close to the other's end compares a weak midpoint/equatorial region with a pole near iron. The strength of the pull helps distinguish the magnet from plain iron.