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Part 1 Before we can consider the effects it might have, we must consider the high...

Part 1

  1. Before we can consider the effects it might have, we must consider the high tension power line itself. Such wires are frequently constructed by twisting aluminum or copper wires together into a large flexible bundle. Consider such a copper cable with a diameter of 4 cm. If this cable is 10 km long, what is its resistance? Remember:

     Resistance = Resistivity * Length / Area

     Resistivity of copper is 0.0000000168 Ω-m

     Cross sectional Area of a cable = π r2

  1. These high tension power lines connect the transformers at a power plant to the transformers at a substation where the voltage is stepped down for household use. Suppose this power line is delivering 200 Megawatts of power at 200 Kilovolts. How much current is flowing through the power line?
  1. Suppose the distance between Felix's feet is 8 cm (about 3 inches). What is the voltage drop in the power line across this distance?
  1. If Felix's legs have a resistance per centimeter of about 1 Megohm, and each leg is 7 cm long, what is the total resistance from foot to foot, ignoring the additional resistance of the body where the legs are connected?
  1. From the above information, calculate the current through Felix's legs.

Assume that birds' sensitivity to electricity is similar to humans and determine if Felix can feel the current through his legs, using the table at the end of this paper.

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