You often see birds resting on power lines that carry currents of 48 A. The copper wire on which the bird stands has a radius of 1.5 cm. Assuming that the bird's feet are 3.3 cm apart, calculate the potential difference across its body.

Answer 1

copper wire 3cm in diameter? Most unusual. Power line theives are on the way.

find resistance
R=resitivity*length/area

voltage=I*R