Science and Engineering

The Secret of the Resistor Maze

We are surrounded by all sorts of electric devices: some are simple like a light bulb, and some are very complicated like a power grid or a computer. Inside these devices, electricity flows around circuits, carrying energy precisely where it's needed.

Electric current is the coordinated motion of an unimaginable number of electrons, but the rules for how much current passes through a device are surprisingly straightforward.

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