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Arkane1337
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Homework Statement
An electric power plant generates electricity @ 22 kV
and 100 A. The voltage is stepped up to 240 kV before
being transmitted to a city 15 km away over a copper
wire that has a radius of 2 mm. Energy is lost in heating
the wire during transmission. If the transformer is 95%
efficient, and the price of electricity is 15¢/kWh, How
much money is saved per day by stepping the voltage up
instead of transmitting it at the original voltage?
Homework Equations
P1 = Ip^2 R
P2 = Is^2 R
Specific resistance of copper = pi d^2 R /4 L , where d = 4x10-3 m (?)
Sp.resistance of copper = 1.7x120^-4 ohm-m (?)
The Attempt at a Solution
No definitive idea of how to solve it unfortunately :/
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