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  • #31
    I just watched the first video. The issue really is that the circuit network isn't the correct format for this. He specifically introduces a new notation without description, then shows that his new notation violates KVL. that's fine, but no one else is going to do that. In practice, a 1V EMF source would be added in place of the battery -- the diagram is just a model of the physical system after all.

    You can also get confusing results when you try to solve purely electro-statics questions with a circuit diagram. such as the one in post #29. (if you think of two plate caps that touch, you can see it takes energy to move the existing charge to the expanded area.)

    (the cube is a good question as it is the same as a bridge circuit. because the voltage at the 4 nodes not connected to the source is the same, no current flows in several resistors. It's really just 4 2ohm resistors in parallel, for 0.5 Ohm)

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    • #32
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      • #33
        Great forum, keep wondering !

        http://www.youtube.com/watch?v=MHlAJ7vySC8

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        • #34
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