A set of 8 different resistance coils to demonstrate how
resistance varies with type, length, and diameter of the
conductor. Made of varnished wire, each coil is wound on
a plastic spool and terminates in two brass binding posts
for low resistance connections. Each coil is labeled and
fits on a plastic peg securely mounted in an aluminum
base. The length of wire in each coil has been selected to
keep calculations simple.