The purpose of this easy experiment is to demonstrate the pattern of magnetic force fields around the magnets of different shapes.
Things Required:
Magnets, a variety-round, bar, U-shaped
Iron filings
Notebook paper
Paper cup
Directions:
Pour the iron filings into the paper cup. Place the magnets on a table. Cover the magnets with a sheet of paper. Sprinkle a thin layer of iron filings on the paper over the magnets. Observe the iron filing patterns.
This Is What Happens:
The iron filings form a pattern of lines around the magnets. The long magnet has a build-up of filings around both ends.
Science Behind It:
A magnetic field is the area around a magnet in which the force of the magnet affects the movement of metal objects. The iron filings are pulled towards the magnet when they enter the magnetic field. The magnetic force increases as the filings near the magnet. The force field has equal strength around the round magnet, but the force fields at the ends of rectangular magnets are always stronger than the force fields in the middle of the magnets.
