Want to see a cool trick? Make a tiny battery with these 3 household items
Briefly

A chemical reaction between copper and zinc plates and citric acid in lemons creates a small current, powerful enough to light a clock or small lightbulb.
Environmental engineer Jenelle Fortunato explains the fundamentals of electric currents, linking the science of the 'lemon battery' to everyday battery technology.
Read at www.npr.org
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