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How big does a water wheel have to be to power a 20 watt light bulb?
Updated: 8/21/2019
Wiki User
∙ 8y agoBest Answer
There isn't one set answer to this. It's going to depend on the output of the generator powered by the water wheel, the revolutions at which the wheel turns (and in turn, turns the generator shaft), etc.
Wiki User
∙ 8y agoThis answer is:
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