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    Does a gherkin really glow green when an electric current is put through it and does this work for any other fruit or vegetable?

    Question #42638. Asked by gmackematix.

    sequoianoir

    I'm not that sure that it is green but you definitely get quite a glow.
    I think that it is more orange from the demonstrations I have seen.
    The circuit through a gherkin or similar, when a high enough voltage and current is applied to electrodes at opposite ends, is due to its water content. It is basically just a "filament" through which an arc can be achieved.
    When it lights up you are cooking it at the same time.
    Other vegetables will work providing they have a high enough water content (may take more volts/amps to achieve an arc the lower it is) and I understand cucumber, courgette and tomatoes work well. They do get hot and may fizz and pop and steam a bit. This can cause them to explode, like an old potato in a microwave oven, if the skin is "airtight".

    Dec 23 03, 5:49 PM

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