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Why is current so small in size?

This is a discussion on Why is current so small in size? within the Electrical & Electronics Engineering forums, part of the CE : Technical Discussions category; why is current so small in size?...

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    Default Why is current so small in size?

    why is current so small in size?

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    Default Re: Why is current so small in size?

    Quote Originally Posted by pallavi agarwal View Post
    why is current so small in size?
    Didn't get your question.

    Probable answer could be: Because its made up of electrons.
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    Default Re: Why is current so small in size?

    Haha, he meant why current values are always in the milli range and such. I think..

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    Default Re: Why is current so small in size?

    If current was any larger it wouldn't fit through the tiny wires...

    ok, so that was a lame joke.

    Can you explain your question a little bit more?
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    Default Re: Why is current so small in size?

    Well, we have been thought current is some'thing'. Current is just flow of energy (not even electrons, they dont travel from one end to the other you know).

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    Default Re: Why is current so small in size?

    Current Cur"rent, n. [Cf. F. courant. See Current, a. ]
    [1913 Webster]
    1. A flowing or passing; onward motion. Hence: A body of
    fluid moving continuously in a certain direction; a
    stream; esp., the swiftest part of it; as, a current of
    water or of air; that which resembles a stream in motion;
    as, a current of electricity.
    [1913 Webster]

    So my dear friend, you must first mention what you mean by current? (Even if, we may safely assume here that you're speaking of electric current).

    Now speaking of electric current, thanks to nano watt technology, modern mico-electronics work with as little as a few nano Amps. But then look at the transmission cables and you'll find that some of them carry kilo Amps of current. So before commenting on size of current we must specify the circuit through which current is flowing.

    The unit of current being Ampere
    is approximately equivalent to 6.24150948×1018 elementary charges, such as electrons, moving past a boundary in one second.

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    Default Re: Why is current so small in size?

    Hey current ranges changes acording to application,transmission lines carry high-current and so on.......mostly in electronic we use low current
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    Default Re: Why is current so small in size?

    The question is not clear enough. And if he meant that usually Current is in mA range, he is wrong. Ok. current in electronics is in mA range. But when it comes to transmision , its in the range of 100 A and above depending on load. Thats why we use current Transformers. If all current was in mA range, then we wouldnt need CT's
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    Default Re: Why is current so small in size?

    Quote Originally Posted by xheavenlyx View Post
    Well, we have been thought current is some'thing'. Current is just flow of energy (not even electrons, they dont travel from one end to the other you know).

    It isn't? I thought that current flow was the passage of electrons from differing potentials. Wouldn't there be current flowing between the two ends of a chemical cell?
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    Default Re: Why is current so small in size?

    @xheavenlyx - Hey, electrons DO travel, don't they?

    That's what I've been taught!
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