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    aditya_solar's Avatar
    aditya_solar Posts: 1, Reputation: 1
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    #1

    Dec 1, 2009, 07:51 AM
    What is electricity how it measures
    Dear sir,

    I submit that what are the difference between the WATTS, VOLTS, AMPEARS, kindly describe with formule or defenations or diagrams,
    Thanking you, ADITYA,
    INDIA.
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Dec 1, 2009, 08:09 AM

    Lets start with Amperes. 1 ampere is 1 coulomb/second.
    A coulomb is a unit of charge. It's similar to flow rate when you use water in a pipe as an analogy.

    Volts is a Potential difference. It's very similar to what pressure is in the pipe water analogy.

    Resistance wasn't asked, but it's similar to the restriction the pipe has on the fow. Higher diameter, lower resistance. The bigger the cross-sectional area of a wire, the lower the resistance. 10 AWG wire has less resistance per length than a 29 AWG wire.

    Certain materials exibit linear behavior with voltage and current. That constat is R or the resistance. R = V/I

    Watts is a joule/sec and is unit of energy. Power in Watts = V * I or the product of voltage and current.

    Lots of relationships can be put together knowing two of the four variables: V, I, R, W and V = I * R and P=V*I
    tkrussell's Avatar
    tkrussell Posts: 9,659, Reputation: 725
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    #3

    Dec 1, 2009, 09:35 AM
    Begin with learning about Ohm's Law:
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