View Full Version : Electricity and resistance Question
PerpetuallyFrustrate
Aug7-03, 06:28 PM
A bird stands on a electric transmission line carring 2500 A. The line has .000025 ohms resistance per meter and the bird's feet are 4 cm apart. What voltage does the bird feel?
I know R = p L/A, but how do i figure out the area. Also do I use 4 cm as the length?
BoulderHead
Aug7-03, 08:13 PM
Could you figure the voltage if the bird had its feet 1 meter apart?
PerpetuallyFrustrate
Aug7-03, 11:12 PM
I dont understand whether the 4 cm is the L and if so then what is the area?
If you know the resistance per meter (0.000025) and the number of meters (0.04) their product should give you the total resistance in the 4 cm length. Knowing the current, it should be a staightforward use of Ohm's Law to get the voltage across that section of the wire. I'm not sure why you would need to use the area at all.
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