Here’s an efficient way to study Ohm’s Law; how the resistance of a conductor varies with changes in length, diameter and material; and the combined resistance of wires in series or in parallel. Ruggedly constructed, it consists of 4 separate strands of wire (No. 30 nickel-silver; No. 24 nickel-silver; No. 30 iron and No. 30 copper), mounted on a sheet-metal base. Each wire is 1 meter long and attached to binding posts. Includes instructions and suggestions for experiments. Requires a regulated DC power supply and a multimeter with a resistance measurement, sold separately. Size: 12.5 x 110cm.
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