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skepticwulf
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Homework Statement
A power station delivers 750 kW of power at 12,000 V to a factory through wires with total resistance 3 Ohm. How much less power is wasted if the electricity is delivered at 50,000 V rather than 12,000 V?
Homework Equations
P=I x V, P= V^2/R, P=I^2 x R
The Attempt at a Solution
With given V1 and R values Power comes as:
P1= (12000)^2 / 3=48000kW, what is this 750kW then?
Is this station delivers power at 48000kW or 750kW??
Again, for V2 and R values:
P2=(50000)^2 / 3=833333kW
I would make the difference of figure P2 and P1 and obviously it's not right according to solution manual , but why? I'm totally lost.