ESAW Mounted Resistance Coils (EEC-9745)

A useful apparatus for showing how resistance varies with the type of wire, length of wire and diameter of the wire in coils. The apparatus can be used with wheat stone bridge or a suitable ohm-meter. Lengths and diameters of wires are in two to one ratio to simplify computations. A set of five collinear coils wound on identical bobbins and mounted on the anodized aluminium sheet with six 4mm sockets to facilitate electrical connections. The coils are:

Coil         Wire             Size                 Length

No.1     Copper         32SWG                 10m

No.2     Copper         38SWG                 10m

No.3     Copper         32SWG                 20m

No.4      Copper        38SWG                 20m

No.5      Nichrome    388SWG              10m