Question

Why is it possible for a bird to sit on high-voltage power lines without getting electrocuted?

Answer 1

Hint: The necessary conditions for an Electric current to flow are: completeness of circuit, A potential difference, Path of least resistance. If any of these conditions are satisfied the bird will get electrocuted by sitting on the high voltage power line.

Complete answer:
Electrocution is defined as an injury or death caused by an electrical shock. If birds aren't electrocuted while perched on an electric wire, they aren't being shocked by electricity.The following are the possible reasons for a bird sit on high-voltage power lines without getting electrocuted:
-The transport of electrons across conductors is how electricity flows.
-The power station pulls electrons from the earth, which then flow via the power lines, your home appliances, and eventually back into the ground (closed circuit).
-To flow, electricity requires a closed circuit.
-Electricity always takes the path of least resistance (the simplest) and is always looking for a way to return from its wire/appliance (high voltage) to a lower voltage or the ground (no voltage).
-Birds' bodies (tissues, cells) are poor conductors, and they don't spend much time on the ground.
-Copper wire, which is used in electrical wires, is an excellent conductor of electricity.
-There is no motivation for electrons to pass through a bird's body (no lower voltage channel to flow to), so they take the path of least resistance and continue to flow along the wire.

Note: If a large-winged bird meets a power line and a tree or power pole at the same time, electricity has a path to the ground, and the bird may get shocked. If a bird contacts two wires at the same time, a circuit is formed, and electricity flows through the bird, electrocuting it.