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A generator supplies 5.0 103 kW of power. The output potential difference is 4500 V before it is stepped up t
Please help me with this problem
A generator supplies 5.0 103 kW of power. The output potential difference is 4500 V before it is stepped up to 510 kV.The electricity travels 520 mi (8.37 105 m) through a transmission line that has a resistance per unit length of 4.3 10-4 /m.
(a) How much power is lost through transmission of the electrical energy along the line?
(b) How much power would be lost through transmission if the generator's output potential difference were not stepped up? (What does this answer tell you about the role of large potential differences in power transmission?)
Assumming your fig for power is 5000 kW = 5 000 000 W
If the V is 510000 v then current (I) = 9.8 A
Total resistance = 837 000 m x 0.00043 = 359.91 ohms
Power loss = current^2 x r = 34566 W
if not stepped up I would be 1111 amps
So power loss would be a massive 1111^2 x 360 = 444MW this can't be right because its more than the power put out.
So not sure, perhaps almost all power would we wasted warming the wires.
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