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P.D and Voltage

Discussion in 'Electronic Basics' started by Music Man, Mar 23, 2005.

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  1. Music Man

    Music Man Guest

    Are potential difference and voltage different?

    Say you have a small 9v battery compared to a car battery.
    One can create a small current for a long period of time while the other
    can create a very large current for a small period.
    Even though they have the same voltage,is the difference that one has
    more ionised particles on both sides(- +) than the other.
    Is voltage defined by how much a material is ionised?

    For instance if I rub my shoes on the floor and touch some metal there is a
    spark
    when I Earth.If the metal is not ionised how do extra electrons pass
    themselves over
    from me to metal,thus earthing?

    Thanks
     
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