Birds won't be killed by the overhead lines.
Although the overhead lines are of high voltage, the overhead lines are very very long (several kilometres or more) . Therefore, the voltage difference between the head and the end of each small segment of the overhead line is very small, while the electric shock actually depends on the voltage difference. Imagine, a bird only stand on a very very small segment of the overhead line (a few centimetres) , so the voltage difference is way too weak to kill the bird.
This question is usually discussed in form 4 form 5 physics XD
Please correct me if I am wrong (time to revise some physics ^^ )
[ Last edited by cyanophile at 4/11/2011 15:07 ]
