Connect each in turn to a battery which provides a source of constant e.m.f., and measure the resulting current by a device called an ammeter. Make a number of rods of different materials so that each is identical in size and shape. ![]() However, more direct answers to the questions can be found by looking at a simple experiment. 2.13 Experimental circuit open an electrical insulated wire, why are there copper strands in the middle surrounded by plastic and not plastic surrounded by copper? In part, the answers to these questions have already been given in the consideration of the structure of atoms and their electron shells. ![]() But why should the electric charge pass along the wires and not leak away as water might leak out from a faulty pipe? Or, if you cutFig. 12 kΩ and 8 kΩ.2.11 Conductors and So far, we have assumed that the current in a circuit will move around the insulators circuit as desired.
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