Descriptions

Apparatus to investigate the dependency of electrical resistance on conductor length, conductor cross-section and material. Four wires are laid out side by side on a wooden base and both ends connect to 4 mm sockets.
Wire specimens:

Copper     0.5 mm dia.,
Iron           0.5 mm dia.,
Nichrome  0.25 mm dia.,
Nichrome  0.5 mm dia.,
Wire lengths: 600 mm
Weight: approx. 1.35 kg