Why don't Birds get Electrocuted on Power Cables? + more videos |

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Electricity is the flow of electrons through conductors. It always takes the easiest route, i.e., electricity always flows through a path of least resistance.
Now, the power cables through which electricity flows are made of copper. Copper offers least resistance and is a very good conductor of electricity. However, the bird's body offers greater resistance and is not a good conductor as copper. Hence, electricity ignores the bird and flows through the cables and birds don't get electrocuted.
Besides this, electricity flows from its highest potential to its lowest. Now, the power cables usually run at different potentials. If bird's feet are on the same power cable, then they are at same potential. Thus, the bird doesn't get electrocuted. However, when the bird touches two cables with different potentials at the same time, then electricity will flow through the bird to go to the other cable with lower potential and the bird will get electrocuted.