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Is there is some kind of physical phenomenon that occur between 4 terminals of 4T resistor?

Altin Guberi

May 29, 2015
2
Joined
May 29, 2015
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Is there anything physical that happens between current and voltage terminals since they are close to each other on 4-terminal Resistor? . I mean is there any phenomenon that occur between Terminal 1 and Terminal 3 , and also between Terminal 2 and Terminal 4 which consequently diminish the contact resistance?
If yes , can you explain if you can ?
Many thanks .
Have a great day.
 

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hevans1944

Hop - AC8NS
Jun 21, 2012
4,878
Joined
Jun 21, 2012
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No magic here. The current flows through two terminals and the other two sense the voltage drop between the first pair. You need to minimize the load on the voltage sense terminals for an accurate measurement. This arrangement is commonly called a Kelvin resistance measurement, after the English lord who dreamed it up.
 
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