PH-1761
Induced magnetism
Physics · Secondary 4 · Hard · Induced magnetism
Two identical unmarked bars, X and Y, are each attracted by the pole of a strong magnet. After the magnet is removed, bar X can still pick up small iron pins, but bar Y cannot. What does this show about bar Y?
- Y is made of steel and is a strong permanent magnet
- Y is non-magnetic and was never magnetised
- Y is made of soft iron and loses its magnetism quickly
- Y is made of plastic and cannot be magnetised
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