How do birds sit safely on electric power lines?
This is possible because a bird only touches one line. If the bird were to touch another line or pole the electricity would travel through the bird, either to the ground or another wire. To do any work, even to harm a person or other living thing, electricity has to flow FROM something TO something. So it could flow FROM a wire TO another wire, or FROM a wire TOO the ground, or FROM a cloud THROUGH a person TO the ground. When a bird sits on a wire there is great electrical POTENTIAL, but it doesn't go anywhere so the bird is perfectly safe since the electrical potential has no path through the bird. Both above answers are correct, though, i have more to add. The electicity carries through to... usually nothing! Like the above answer, there is that potential though. If there were another wire which the bird was also touching, there would be problems and if it were to touch another bird, result is the same. Another interesting fact, I might add: If someone were to grab a power line with both hands at the EXACT same time, while feet were not on the ground and NOT, i repeat NOT touch anything else or put anthing on the power line, while already holding it, and then let go at EXACTLY the same time, without touching the ground first... That person would survive, no injuries! I might add, while most birds perch on electrical wires perfectly safely, they do present some dangers. In particular, large birds such as eagles have wingspans wide enough that they occasionally brush two parallel wires with their wingtips, which completes the electrical circuit and allows electricity to run through the bird's body, killing them. This is a serious problem in certain desert areas where the birds use the electrical poles for nesting, due to limited other options.
Why is it that birds can perch safeley on high voltage electric lines but if electrical workers accidentally touched a line they would be killed instantly?
Tom W. Sparling has written: 'An evaluation of alternate routes for the Solandt Commission's public inquiry into the transmission of power between Lennox and Oshawa' -- subject(s): Electric lines, Electric power distribution, Environmental aspects, Environmental aspects of Electric lines, Overhead electric lines, Right of way
Why are the wingspans of birds a consideration in determining the spacing between parallel wires in a power line?
If the wingspan of birds is sufficient to span the wires that differ in electric potential, then the bird acts as a path for current to flow from the high voltage wire to the low voltage wire. Since the electric potential differences are huge in power lines, it is very likely that the bird will be cooked when it completes the circuit and the ground below will become littered with carcasses.
Actually if we were to sit on a power line and not touch anything else like the birds do we would not get electrocuted.The current a flow of electrons,flows along a path of least resistance the electrons want to get to where they are going in the easiest possible way. Electricity flows from one voltage to another value of voltage. For the birds, the power lines have the same voltage -- so the birds are…
Anthony J. Pansini has written: 'Guide to Electric Power Generation' 'Electricl.distributn.engnrng-Ise' 'Engineering economic analysis guidebook' -- subject(s): Engineering economy 'Basic electrical power transmission' -- subject(s): Electric power transmission 'Power Transmission & Distribution' 'Transmission Line Reliability and Security' 'Electrical transformers and power equipment' -- subject(s): Electric apparatus and appliances, Electric transformers, Protection 'Common Manual of Our Revolutionary History' 'The Federalist, continued' -- subject(s): Constitutional history, Constitutional law, Politics and government 'The Duce's dilemma' -- subject(s): World…
Ah but they DO! It is the action of electromagnetic lines of force (EMF) passing through a conductor that introduces current in the conductor. This is the basic principle behind electrical power generation. Answer The question relates to electric lines of force, not magnetic lines of force. Electric lines of force radiate perpendicularly from electric charge. As like electric charges distribute themselves evenly over the surface of a conductor, the electric lines of force radiate…
Theoretically, human beings can sit safely on an individual overhead line conductor, providing no part of their body comes into contact with another conductor or the earth. In practise, of course, it's another story as it's highly improbable that anyone could approach a high-voltage line in the first place!