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How Do Magnets Stick to Fridges?

How Do Magnets Stick to Fridges?

磁铁为什么能吸在冰箱上?

  1. Magnets pull certain metals like iron and steel.
  2. Fridge doors have thin steel sheets inside them.
  3. Magnetic force works without touching the metal.
  4. It flows through space around the magnet.
  5. Not all metals stick — aluminum and copper do not.
  6. The magnet holds best on flat, clean steel parts.
  7. Stronger magnets hold heavier things safely.
  8. This force is invisible but very useful every day.
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