Aluminum Power
by admin on Thursday, January 7th, 2010 | No Comments
A bird sits on a high-voltage power line with its feet 4.0 cm apart. The wire is made from aluminum, is 2.0 cm?
A bird sits on a high-voltage power line with its feet 4.0 cm apart. The wire is made from aluminum, is 2.0 cm in diameter, and carries a current of 190 A. What is the potential difference between the bird’s feet?
Assuming Resistivity of Aluminium : 2.82 × 10^-8 Ω·m
Resistance of 0.04 meter length of 2.0 cm dia wire = 2.82 × 10^-8 x 0.04 / ( 0.7854 x 0.02 x 0.02) = 8.97631 x 10^-5 ohms
V = ( I x R ) = 3.59052 x 10^-6 x 190 = 6.822 x 10^-4 volts ans
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