Bar magnet with visible magnetic field lines created by iron filings on a white surface
Keywords
magnet,
science,
physics,
north pole,
south pole,
attraction,
repulsion,
magnetism,
energy,
power,
force,
education,
laboratory,
discovery,
research,
technology,
electromagnetism,
polarity,
positive,
negative,
metallic,
powder,
demonstration,
study,
material