Modelová Otázka ID 3496 - 
Kovy, jako jsou měď či hliník, vynikají vlastnostmi, které umožňují jejich využití v demonstračních experimentech za účelem pozorování elektromagnetické indukce, mezi něž patří například zasunování magnetu do závitu tvořeného některým ze jmenovaných kovů. Těmito vlastnostmi jsou:
Správná odpověď je: C
Hliník ani měď nejsou feromagnetickými látkami. Hustota hliníku je 2 700 kg · m–3 a hustota mědi je ještě vyšší, zhruba 8 960 kg · m–3. Oba kovy jsou sice velmi dobrými vodiči tepla, jejich vlastností umožňující mj. jejich využití při demonstracích jevů souvisejících s elektromagnetickou indukcí je však jejich vysoká elektrická vodivost, která je důsledkem kovových vazeb mezi atomy těchto kovů.
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