Yes, demand has to be created. Presence of the voltage in closed circuit creates current, hence magnetic field around the wire. Load creates electric filed between the wires. Electric and magnetic fields are always perpendicular. They are like XY plane with vector Z (Poynting vector) showing direction of energy flow. With AC both electric and magnetic fields change direction simultaneously, but Poynting vector (direction) stays the same. Current itself is just a flow of electric charge. Same amount of electric charge that leaves the source - comes back. Energy is delivered on the outside of the wire.
If Power Cords Don't Matter...
First of all, I don’t own any high-end power cords, mostly because I can’t fit them behind my rack. Second, I am not trying to stir up controversy, as you will see from my question. I understand that the people who believe power cords make no difference argue that once the power gets into the component, the AC is converted to DC and the power supply of the component takes over completely. I think I have that right for the most part. So it that’s true, and it probably is from a traditional EE standpoint, why is it that I have not heard anyone say that power conditioners make no difference? I am not aware of anyone with a decent system ever saying that a Niagara or Triton or Audience teflon conditioner didn’t affect their sound, for good or for bad. So if the EE theory is true, wouldn’t power conditioners make no difference either? I have an Audience AR6T for almost 10 years and I think it made a big difference. BTW - I am not talking about Power Plants, which deal with voltage stabilization, which is a different topic. Obviously, if your AC voltage is way off, it's going to cause problems.
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judge for yourself if power cords do/don't make a difference: https://www.youtube.com/watch?v=c_bJTMD5_aI |
Maybe you should explain how voltage is analogous to physical water pressure. I can think of a lot of ways pedroeb, but this is the one I want to try. Since you think voltage is not pressure, I will put both hands across a 12v car battery if you will hold your hands half an inch above a 12kV panel. Since voltage isn't pressure and you have to complete a circuit you should be okay with doing this. When I am fine and you are fried we will see who still thinks voltage isn't pressure. Deal? |
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