How many milli-amps does a potato produce?

A potato itself doesn't produce milli-amps. It's a common misconception that a potato is a power source. What actually happens is that a potato can act as an electrolyte in a simple battery setup.

Here's how it works:

* Electrodes: You need two different metal electrodes, like a copper coin and a galvanized nail.

* Electrolyte: The potato's internal moisture acts as an electrolyte, allowing ions to flow between the electrodes.

* Chemical Reaction: When the electrodes are placed in the potato, a chemical reaction occurs at the metal surfaces, creating a small voltage difference.

The amount of current (measured in milli-amps) produced depends on several factors:

* Potato type: Different potatoes have varying levels of moisture and internal conductivity.

* Electrode size and material: The larger the surface area of the electrodes and the greater the difference in their reactivity, the higher the current.

* Potato freshness: A fresh potato will have higher moisture content and produce more current.

However, the current produced by a potato is extremely low, typically in the micro-amp range (µA), which is thousandths of a milli-amp. It's not enough to power anything significant.

The potato battery experiment is more of a demonstration of basic electrical principles than a practical source of energy.