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.
copper wire 3cm in diameter? Most unusual. Power line theives are on the way.
find resistance
R=resitivity*length/area
voltage=I*R