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aznking1
- 16
- 0
Homework Statement
Ok so i was doing my revision for my exams and i was reading on transformers and they said that stepped-up Voltages and stepped-down currents minimizes for tranformers I^2R power losses in the transmission cable. I know that current is decreased, but a higher voltage, by V^2/R, would also mean a greater power loss?
The Attempt at a Solution
I know there have been similar questions like this one below.
physicsforums. com/showthread.php?t=227834( there's a space at the .com cause i can't post links yet)
But i do not understand their reasoning. For example stewartcs said that problem with this line of reasoning is that P = IV is the power delivered by an electrical energy source not the power dissipated by it.
Also the person who asked the question said that he was mixing up the supplied nominal V of the power lines with the V lost by the resistance.
i do not really understand what both of them are saying. can anyone explain it to me? thanks!