Why some metals hold a charge while others let it slip
In short: Understanding magnetism requires distinguishing between objects that generate their own fields and those that merely react to others. This video breaks down the physics of permanent, induced, and temporary magnets for the 2027/28 GCSE exams.
The core distinction lies in the source of the magnetic field. Permanent magnets consistently produce their own fields, whereas induced (or temporary) magnets only exhibit magnetism when placed within the field of a permanent magnet. This interaction is always attractive.
Materials behave differently based on their composition. Elements like nickel, cobalt, and iron—along with alloys like steel—are magnetic materials. These are categorized as 'soft' or 'hard': magnetically soft materials like iron lose their magnetism quickly, while magnetically hard materials like steel retain it more slowly.
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Sources
- Summary by Intellect · source: GCSE Physics - Permanent & Induced Magnets (2027/28 exams)
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