The Kelvin Water Dropper

The Kelvin water dropper is an electrostatic generator that was invented in the 1860s by William Thomson—better known as Lord Kelvin. The device uses drops of water falling into separate buckets to generate opposite electrical charges, which will eventually discharge via an arc between the buckets. If the buckets are insulated from each other, they can become so charged that they may even fling the water droplets away before they land. How can one build such a device at home? Discuss

Source: The Free Dictionary

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