Advanced Science Primary 3 Diversity

Ravi is testing four rods (P, Q, R, and S) to see if they are magnetic. Which observation proves a rod is a magnet?

A Rod P is attracted to a piece of iron.
B Rod R is repelled by another magnet.
C Rod Q is attracted to another magnet.
D Rod S is not attracted to anything.
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Worked Solution

Step 1: Magnetic materials are attracted to magnets. Step [2-9]: Repulsion only occurs between two magnets with like poles facing. Step [2-9]: Therefore, repulsion is the only sure test of a magnet.

Correct answer: Rod R is repelled by another magnet.

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