Why does a potato have voltage?

Answer

Potatoes have a voltage because they contain a type of juice that serves as an electrolyte. They also have phosphoric acid that reacts well when used with both the zinc and the copper electrodes.
Q&A Related to "Why does a potato have voltage?"
When two different metals are pushed into a potato a voltage can be measured across the metals. The same is true for many fruits and vegetables. The reason is that chemicals, normally
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They would if you grew them confined in a small box (e.g. see japanese square melons) Because soil (where potatoes typically grow) provides little and relatively equal resistance
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The starch in the potato comes from photosynthesis. (In fact, starch is a big molecule
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