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    wetona's Avatar
    wetona Posts: 6, Reputation: 1
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    #1

    Aug 25, 2004, 07:48 AM
    Electrical current flow
    Electrical current through wires is similar to water flowing through pipes. Using this analogy make a statement about how electrical current flow is related to the resistance of the wire it flows through.


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    urmod4u's Avatar
    urmod4u Posts: 248, Reputation: 4
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    #2

    Oct 16, 2004, 03:37 PM
    The property of water that is comparable to the resistance of a wire, is the viscosity of the water.
    Note that the viscosity is a property of the water (the current) and that the resistance is a property of the material the wire is made of (the conductor). So the analogy is not quite right.
    But it is correcter than the pipe's diameter - which rather compares to the wire's diameter - both having their influence on the resistance.
    High viscosity (electrical: resistance) will cause low current for a given pressure (electrical: voltage).
    Hot water has lower viscosity than cold water, it flows easier (=faster, more current). That is, BTW, why the pitch of the sound of flowing water from a hot water tap changes when the hot water arrives.

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