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The potato-battery experiment only generates about 1.5 volts a few milliamps. For a 40W incadescant bulb you typically need 120V and about 330 mas. If you could control all your losses in circuitry and somehow group the potatoes in series you would need about 160 potatoes. Wire 80 in series and parallel that with another 80 in series. This will provide DC vice AC. You need the proper anode and cathode and proper gauge wire. 40W isn't practical application. Try smaller bulb for starters and work your way up.

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Wiki User

13y ago
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Wiki User

10y ago

Its not the potato that determines this but the metals used in the two electrodes. As you failed to mention the metals of the two electrodes being used, I am unable to provide a specific answer.

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Wiki User

8y ago

It's completely misleading to say that a potato, or any other source of food, has a certain number of watts "in it'. The potato may contain a certain amount of chemical ENERGY; energy is expressed in JOULES, not in WATTS. The watt is a unit of power (energy / time - in this case, joules/second).

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Wiki User

13y ago

I will figure out the answer when im good and ready...

Losers:d

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Wiki User

9y ago

A potato has about an average of 0.9 V. Or 1.5 to 1.3 with an Idaho Potato.

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Wiki User

11y ago

Potatoes are composed of carbohydrates which have immense molecules with varying chemical formulas and structures. Therefore, the electrons in a potato cannot be strictly calculated.

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Wiki User

8y ago

There are zero watts in a potato. There is a lot of starch though.

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Wiki User

10y ago

From 2 to 3 volts.

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Michael Greer

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2y ago

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Q: How many potatoes does it take to power a 40 watt light bulb?
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