Materials List: Visualizing Magnetic Field Lines

Each group needs:

  • compass
  • rubber-coated NdFeB magnet
  • paper holder for iron filings
  • 1 teaspoon of iron filings
  • clear bottle of prepared mineral oil*
  • 1 sheet of paper, 8.5 x 11 inches (20.32 x 27.94 cm)
  • masking tape

* Remove labels on a clear plastic bottle of mineral oil. Cut ~1 teaspoon of fine-grade steel wool into small shards. Put the steel wool shards into the bottle and recap. After shaking, the bottle displays magnetic fields in three dimensions.