It's because the bird is not "grounded". Which means that the bird must have some part of itself touching the wire AND the ground at the same time. If it was.....then it would be electricuted. That's the reason why the wires are 20/30 feet high off the ground.........so, that animals nor humans can get electricuted.
2007-01-06 00:49:02
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answer #1
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answered by Jammin' On The One 3
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For an electric current to flow, a complete path must exist. In
the case of birds on a wire, no path exists that is better (lower resistance)
that the one that already exists. Three conditions must exist if the "bird"
were to get shocked:
1 - There must be sufficient potential and electric current to overcome the
body resistance of the bird (no problem there).
2 - There must be little or no insulation on the wire (sometimes no problem).
3 - The bird must simultaneously contact the bare wire and a conductor
providing a path to ground (earth) or another conductor with a different
electric potential (a second phase of AC current, for example). Since most
high wires are sufficiently Separated to prevent this type of thing from
occurring, and they are also insulated both on their surface and on from the
poles, it is unlikely that a bird will become a crispy critter. It does
happen though . . .
2007-01-06 08:48:20
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answer #2
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answered by Rohit S 2
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Because electricity is actually the flow of electrons, which is "current". In order for electricity to flow you have to have a complete path from a high potential to a lower potential, like ground. Since the birds are no where near a ground no electricity can flow and the birds are not harmed. Incidentally, large birds, like eagles, have been killed by power lines when their wings touch two lines at the same time. Further, if a person were hanging from a power line and not touching the ground or another wire the person would not be harmed (but don't try it).
2007-01-06 08:45:52
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answer #3
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answered by Terence C 3
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beacause the birds sitting on open electric wire flowed with current has only one pole i,e the -ve or +ve , and the the current can only work if the both pole is connected or grounded, the birds sit only in a single wire and so they are not harmed and other the flow of -ve ions in the birds body is very less this may be the next cause.
2007-01-06 09:44:28
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answer #4
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answered by Ganesh Thakur 2
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Because the electricity is actually trying to get to the ground, not into the bird. Since the bird provides no connection to the ground, the electricity flows around rather than through it.
2007-01-06 08:47:10
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answer #5
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answered by Anonymous
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Electricity is harmless when passing through or over an object, it gets dangerous when it comes in contact with a grounding effect.
2007-01-06 08:53:55
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answer #6
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answered by Anonymous
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They get affected if they touch 2 wires or if the touch the ground
2007-01-06 08:46:57
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answer #7
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answered by AlienHallucination 2
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Because they are not touching the ground at the same time. If they were then the current could pass through them to earth and they would be electrocuted.
2007-01-06 08:47:36
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answer #8
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answered by The Mad cyclist 4
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Because there is no contact with the ground, which is where electricity always runs (like in a lightning storm).
2007-01-06 08:47:04
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answer #9
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answered by Superdog 7
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current passes through a body when two parts of it are at differnet voltages eg you touch a wire but your feet are grounded. the birds feet are both at the same voltage so no current passes through them.
2007-01-06 08:46:37
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answer #10
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answered by Fitz 3
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