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Help with Physics, electricty....

C

chiwawa626

Lifer


<< How is the current of electricity different between these two situations? Why is it different? *** In your answer you must explain both ?how? and ?why?.
(a) You grab a "live" high-voltage wire with your bare hands which is laying in the street, broken free in a storm.
(b) You "tight-rope walk" bare foot along a "live" high-voltage wire. >>

 
I can't give you a technical answer, but in the first you're touching the ground, so the electricity uses you to get to the ground. In the latter, it can't use you to go anywhere so you're not harmed. Hope that helps.
 
the current shouldn't be any different in the two situations, just the way that it uses you, or goes through you, which was answered previously
 
In part a electricity always seeks the easiest path to the ground. It tries to find a conductor, such as your body which is 70% water which is a conductor as well.So if you are grounded and you a power line, electricity will pass through you and shock you.
There is a potential diffrence between the ground and the live wire, so you get shocked beacuse you are the path between the two.

But in part b, just like birds can safely sit on a power line without being shocked, a tightrope walker can do the same. To be shocked, there must be a potential difference across two points of the persons body in this case the feet. When standing on a power line, there is no potential difference between the feet, so you cant be shocked. But if you were to be touching the ground also you would be shocked as well as if you slipped or somthing and a part of you came in contact with the other wire or the ground at the same time you could be shocked.

🙂
 


<< Same reason a bird can sit on a high voltage wire and not get fried. No path for current to flow. >>



I always thought it amusing that the code words for different size conductors are named for birds, such as 'bobolink' lol
 
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