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    in a physics exam, if given a circuit diagram with a diode for example I would have to know which direction the current was flowing before deciding whether the diode was forward or reversed. Would it be conventional from pos to neg or the other way?
    Also when drawing a cell you have a long line followed by a short line. Does this give any indication of which is the pos/neg terminal at all??

    im getting myself confused! thanks in advance for any help!
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    Conventional current unless they say.
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    (Original post by rub em out)
    in a physics exam, if given a circuit diagram with a diode for example I would have to know which direction the current was flowing before deciding whether the diode was forward or reversed. Would it be conventional from pos to neg or the other way?
    Also when drawing a cell you have a long line followed by a short line. Does this give any indication of which is the pos/neg terminal at all??

    im getting myself confused! thanks in advance for any help!
    As unamed says, from plus to minus.

    As for the symbol of a cell, the longer line indicates higher potential (+ sign), shorter indicates lower potential (- sign). So the current flows from the longer to the shorter (although in reality electrons are attracted by the higher potential and move in the opposite direction).
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    thanks guys, really cleared that up for me!
 
 
 
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