Magnetism

Vocabulary Review

TransformerA device for increasing/decreasing voltage

ElectromagnetA magnet with a field produced by electric currentusually in the form of a wire coiled around a piece of wire

Magnetic PoleOne of the regions on a magnet that produces a magetic force

GeneratorA machine that produces electric current by rotating a coil within a stationary magnetic field

Magnetism

Which is greater?The gravitational attraction between the scrap iron and Earth or The magnetic attraction between the magnet and scrap iron? Why?

HistoryThe name "magnet" may come from lodestones (naturally occurring Magnetite) found inMagnesia

Pieces of lodestone, suspended so they could turn, were the firstmagnetic compassesand their importance to earlynavigationis indicated by the namelodestone, which means 'leading stone'

Magnetic PolesMagnets exert forces on each otherSimilar to electric charges b/c they can attract or repel without touchingTheir strength depends on the distance of separation between the two magnetsIf electric charges produce electric forcesmagnetic poles produce _______