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Thread: Working of lightning rod

  1. #1 Working of lightning rod 
    Forum Freshman
    Join Date
    Jan 2008
    Why is the tip of lightning rods pointed and not disc shaped?
    Does it work by repelling the clouds or is it that it attracts the charges to make them flow through it?

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  3. #2  
    Forum Bachelors Degree Shaderwolf's Avatar
    Join Date
    Dec 2005
    OPSEC, baby. Sorry.
    Lightning rod's are pionty, because Ben Franklin thaught it would be best that way. It became tradition. Bluntt ends are actualy better. When a rod with a pointy end is inside an electric field (for example an electric field that is the result of a thunderstorm), a cloud of ions forms around the pointy end. This ion cloud weakens the electrical field. Lightning is attracted less. This effect does not occur with rods with a blunt end.

    The rod provides an easier path for the lightning to pass through. Electricity would rather pass through the path of least resistance. This is why lightning rods help houses/buildings/ect.

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  4. #3  
    Forum Professor
    Join Date
    Apr 2007
    In the circuitous haze of my mind
    Aren't the ions the electric field? Do you mean instead that it impedes the ability of the lighting to "see" the metal?
    Of all the wonders in the universe, none is likely more fascinating and complicated than human nature.

    "Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

    "Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence"


    Use your computing strength for science!
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