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Hyper physics website says this Electric current flow is proportional to voltage difference according to Ohm's law, and both the bird's feet are at the same voltage. Since currentflow is necessary for electric shock, the bird is quite safe unless it simultaneously touches another wire with a different voltage. ...


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One should really be careful when mixing circuit theory and electromagnetic theory... Fact of the matter is, circuit theory is a much simplified version of electromagnetism. In circuit theory, we speak of the "voltage" of a point, in reference to the ground, and act like it is a well-defined quantity. In fact, what is called the electrical potential is ...



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