History of Magnets Video Lecture | Physics for JAMB

magnetic forces have been known about
for a very long time
according to Greek legend magnetism was
first discovered by a shepherd when his
feet suddenly stuck to the ground
the iron nails in his sandals had become
attracted to a magnetic rock this
curious stone became known as magnetite
after magnesia where it was found but it
was also known as lodestone and was
highly prized because of its attractive
properties
ha in ancient Egypt magnetic repulsion
was used to play tricks nothing up my
other sleeve ha ha he objects of worship
were made to float in midair by the use
of carefully placed magnets across the
first emperor of China used magnetic
forces to protect his palace and I
joined has it that the gates were made
from lodestone come on come on
is that his bottom what attacking
enemies wearing iron armor were
completely flummoxed when they were
instantly attracted to the gate and got
no further and this is a small lump of
lodestone like any metal or it's found
in the ground the scanner reveals its
natural magnetic field for centuries
lodestone was our only type of magnet