March 15th, 2017, 09:14 AM  #11  
Senior Member Joined: Jun 2015 From: England Posts: 558 Thanks: 145  Quote:
I would, of course, be open to your posted proof of this over general statement. Quote:
 
March 15th, 2017, 09:15 AM  #12  
Senior Member Joined: Apr 2014 From: Glasgow Posts: 1,928 Thanks: 628 Math Focus: Physics, mathematical modelling, numerical and computational solutions 
Sorry... just noticed this post... Quote:
Quote:
Even if you pass a monumentally large current, ocean currents have a very, very low current density because they are so large, so the impact on swimmers is going to be stupendously weak. Quote:
Power distribution in North Korea is probably not much more different than power generation and distribution elsewhere. Electricity grids are old technology and most of the innovation is about energy efficiency of components, decentralisation of the sources of electricity (socalled move to 'microgrids' or 'electricity clouds'), effective peak demand response and the move to renewable energy sources. When electrical engineers talk about security of an electrical supply, they're typically referring to theft rather than vandalism. Quote:
 
March 15th, 2017, 11:38 AM  #13 
Senior Member Joined: May 2015 From: Arlington, VA Posts: 229 Thanks: 23 Math Focus: Number theory 
Thanks, Benit13, with the exception of Kirchoff's laws, my post is too much latenight speculation.

March 15th, 2017, 03:19 PM  #14 
Senior Member Joined: Jun 2015 From: England Posts: 558 Thanks: 145 
Since you are both so hung up on the universality of Kirchoff's Laws, perhaps you would like to explain how to apply these Laws to this simple but complete circuit? Have either of you seen Professor Lewin's (MIT) famous lecture as to why Faraday was right and where Kirchoff was inapplicble? https://www.google.co.uk/search?hl=e...XfN5vFVs#spf=1 
March 15th, 2017, 04:48 PM  #15 
Senior Member Joined: Jun 2015 From: England Posts: 558 Thanks: 145 
If you don't like the use of digital circuits as examples, here is a power connection circuit, that can't be solved by Kirchoff's Laws. What is the voltage at A and the current through the resistor? I have shown batteries, but this issue is faced every day by power plant engineers as most plants need to employ multiple generators in parallel. 
March 15th, 2017, 07:14 PM  #16 
Senior Member Joined: May 2015 From: Arlington, VA Posts: 229 Thanks: 23 Math Focus: Number theory 
I seem to be in good company, so I will naively guess the voltage between node "A" and ground (that across the resistor) is (1/(1/12+1/6)) Volts=4 Volts , and the current through the resistor is V/R=4 Volts/10 Ohms=.4 Amps. Actually, what happened to the internal resistance of the batteries? Being simple, I like "counterintuitive." Please draw more legibly. 
March 15th, 2017, 07:40 PM  #17 
Senior Member Joined: Feb 2016 From: Australia Posts: 981 Thanks: 346 Math Focus: Yet to find out.  
March 15th, 2017, 09:59 PM  #18 
Senior Member Joined: May 2015 From: Arlington, VA Posts: 229 Thanks: 23 Math Focus: Number theory 
No insult intended. Listen to Prof. Lewin on YouTube when he mentions "nonintuitive." It's neat to try puzzles like "The Game Show Problem": Game Show Problem  Marilyn vos Savant. It is one of the great examples of counterintuitive logic, simple yet profound. That's where most great questions and answers can be found, and problems one can focus on. Again, refer to Prof. Lewin on Kirchoff vs. Faraday re intuition. Apparently your problem may be counterintuitive to Kirchoff's laws. But I diverge from your inquiry. 
March 16th, 2017, 02:15 AM  #19 
Senior Member Joined: Apr 2014 From: Glasgow Posts: 1,928 Thanks: 628 Math Focus: Physics, mathematical modelling, numerical and computational solutions  

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