Birds resting on high-voltage power lines are a common sight. A certain copper p

Question

Birds resting on high-voltage power lines are a common sight. A certain copper power line carries a current of 52.3 A, and its resistance per unit length is 8.84 times 10^-5 Ohm/m. If a bird is standing on this line with its feet 3.1 cm apart, what is the potential difference across the bird's feet? Answer in units of V. The current in a resistor decreases by 2.44 A when the voltage applied across the resistor decreases from 14.G V to 2.74 V. Find the resistance of the resistor. Answer in units of Ohm.

Explanation / Answer

here,

current in the line , I = 52.3 A

resistance per unit length , p = 8.84 * 10^-5 ohm/m

d = 0.031 m

the resistance , R = p * d

R = 2.74 * 10^-6 ohm

the potenial difference across the bird's feet , V = I * r

V = 1.43 * 10^-4 V

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