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Because they are not touching the ground.
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∙ 13y ago
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What happens to a person who hangs on the power line?
If a person is simply hanging from the power line, not touching anything else, nothing much will happen. This is also the reason why birds can sit on power lines, and squirrels can run along them without injury. However, if the person hanging form the power line completes a circuit by touching anyhting through which current can flow, that person will be electrocuted and may not survive the experience. Items that could be touched and cause electrocution include vehicles, ladders, power poles, trees and shrubs, kite strings, other power lines operating at different voltage, among other things.
How does engery get from a power plant to a house?
through a power line : )
What is the dangers of microwaves?
you could get burned and if you're aren't using it correctly, you could be electrocuted. I researched it on line last week and I surveyed 15 microwave companies and 14 answered this. actually i believe they were asking about microwave waves. the danger of these are death
How much power can a transmission line carry example how much power can a 69kv line carry compared to a 390kv line what is the formula for power capacity of a hvac line?
For a line of given cross section and material, the power capacity will depend on the current carried, since resistance heating is proportional to (current)2 . For a given power, current is inversely proportional to voltage. Thus raising the voltage from 69 to 390 kv would reduce the current by a factor 69/390 = 0.177 , for the same power transmission, and reduce the heating losses by 0.1772 = 0.031. So you can see why high voltage for long distance lines is essential. Obviously the limiting current on a power line has to be set by economic and practical considerations, but if this is predetermined and set, the limiting power will be that which produces that limiting current, and power = voltage x current. The actual limiting curent will depend on the line cross section, material, and length. The power that a line of a certain voltage can carry is calculated by using the following formula: (2.55×(KV)2 /1000) MW.
How does the third rail of a subway work?
it is the power line of the train, just like the usual train have the power line in the air. the reason to this is do to that most of the rail is under ground and to have the power in the air under the ground can be dangerus, the usual pover line over the normal tains can travel up to 1/2 meters or more. so when you are under the ground the power is direkted in another way. this is also a cheaper methode to to so, and as long as you dont ty to phas the line you wont get shoked. it works like the other trains as a pluss.
How come birds can land on power lines without being electrocuted?
The high voltage is between one wire and the other. From one point on the wire to another point on the same wire, the voltage is quite insignificant. As long as the birds don't touch both wires, nothing much will happen. The wire does not have a difference in voltage from foot to foot. The term "high voltage" refers from wire to ground. Electricity flows down a voltage gradient. There is no gradient of voltage between the feet.
Birds sitting on a single power line don't get shocked because there is no path for current to flow to the?
Ground
Where do power line birds nest?
Atop the power line poles.
Why don't birds get electrocuted when both of their feet are on a power line?
Because there is no ground. In order for them to be part of the circuit, there has to be a way for the electricity to more easily flow through them to something else then for it to continue travelling on the wire. because its not grounded
Birds sitting on a power line don't get shocked because there is no to ground.?
Birds are not good conductors of electricity. Their cells and tissues do not offer electrons an easier route than the copper wire they are already travelling along
Why is it that birds sitting on a single power line don't get shocked but if they placed one foot on each of two lines the current would flow between their feet and they would receive a terrible shock?
Yes, if one power line has a sufficient voltage difference to the first power line, the bird can be electrocuted. Normally, a bird has both foot one wire only, which cannot complete an electical circuit. In that case no electricity can flow through the bird. It often happens that a large bird such as an eagle or condor have wingspans of eight feet or more, and can touch two different power lines at the same time. Many birds have been found dead from this form of electrocution. For this reason, many newer power lines have greater spacing than the eight to ten foot wingspan of large birds.
How birds sitting on a single power line don't get shocked because there is no path for current to flow to the blank?
Birds are not good conductors of electricity. Their cells and tissues do not offer electrons an easier route than the copper wire they are already travelling along
How do birds not get electrocuted on power lines?
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 safe. Don't approach power lines, because humans come from the ground, which is a sink for the current.
How do you spell electrocute?
The verb for to execute or kill by electric shock is indeed to electrocute.(Example : Touching a hanging power line can electrocutea person.)
What happens to a person who hangs on the power line?
If a person is simply hanging from the power line, not touching anything else, nothing much will happen. This is also the reason why birds can sit on power lines, and squirrels can run along them without injury. However, if the person hanging form the power line completes a circuit by touching anyhting through which current can flow, that person will be electrocuted and may not survive the experience. Items that could be touched and cause electrocution include vehicles, ladders, power poles, trees and shrubs, kite strings, other power lines operating at different voltage, among other things.
Why does a boy flying a kite have more chance of getting electrocuted?
A boy flying a kite has more chance of getting electrocuted if the kite accidentally touches a power line or other electrical source. The electricity can travel down the string and shock the person holding it. It's important to fly kites in open areas away from power lines to reduce this risk.
Why do birds not get electrocuted when they sit on the third rail?
In order for someone to be electrocuted by a live power line or 3rd rail on the train they must also be in contact with ground, or close enough for the power to jump to ground on it's own. That is also why they can sit on a power wire, the insulators at the poles keep the power from reaching ground. High voltage transmission lines can be repaired by a helicopter crew. There is a strict procedure to follow though. The helicopter hovers close to the wire and a ground between the helicopter and the wire is established by making contact with the wire through a high voltage probe. Once that occurs, the operator hooks a clamp to the wire for a permanent connection. At this point, the operator can touch the wire and repair it without getting shocked. When done, the reverse procedure is followed exactly.
