# Electricity and resistance Question

#### PerpetuallyFrustrate

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?

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HInt

Could you figure the voltage if the bird had its feet 1 meter apart?

#### PerpetuallyFrustrate

No

I dont understand whether the 4 cm is the L and if so then what is the area?

#### futz

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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