Apparatus:
motor,
bar
magnets,
power
supply
Description:
If
using
magnets,
slide
them
in
the
magnet
holders,
so
that
they
touch
the
big
coil.
Give
the
small
coil
a
spin.
If
using
the
power
supply,
connect
the
large
coil
in
parallel
and
give
the
small
coil
a
spin.
The
small
coil
will
rotate
more
rapidly
if
the
voltage
on
the
power
supply
is
increased.