e&m.jpg (12862 bytes)

PLOTTING LINES OF FORCE OF A BAR MAGNET

EQUIPMENT
    redball.gif (326 bytes) Bar Magnets
    redball.gif (326 bytes) Iron Filings
    redball.gif (326 bytes) Glass or Plastic Plate
    redball.gif (326 bytes) Rubber hammer

 
NARRATIVE
        Magnetic lines of force can be plotted with iron filings.

        Place a single bar magnet or combination of bar magnets on the lecture table overhead projector. Cover this/these with a glass or plastic plate. Sprinkle iron filings on the plate and tap it with a rubber hammer to align the filings with the magnetic field.