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2. Four-terminal sensing - Wikipedia

   en.wikipedia.org/wiki/Four-terminal_sensing

   Four-point measurement of resistance between voltage sense connections 2 and 3. Current is supplied via force connections 1 and 4. In electrical engineering, four-terminal sensing (4T sensing), 4-wire sensing, or 4-point probes method is an electrical impedance measuring technique that uses separate pairs of current-carrying and voltage-sensing electrodes to make more accurate measurements ...

3. Contact resistance - Wikipedia

   en.wikipedia.org/wiki/Contact_resistance

   Beside the TLM it was proposed the gated four-probe measurement [3] and the modified time-of-flight method (TOF). [4] The direct methods able to measure potential drop on the injection electrode directly are the Kelvin probe force microscopy (KFM) [ 5 ] and the electric-field induced second harmonic generation.

4. Kelvin bridge - Wikipedia

   en.wikipedia.org/wiki/Kelvin_bridge

   The operation of the Kelvin bridge is very similar to the Wheatstone bridge, but uses two additional resistors. Resistors R 1 and R 2 are connected to the outside potential terminals of the four terminal known or standard resistor R s and the unknown resistor R x (identified as P 1 and P′ 1 in the diagram).

5. No. 4 Electronic Switching System - Wikipedia

   en.wikipedia.org/wiki/No._4_Electronic_Switching...

   The No. 4 Electronic Switching System (4ESS) is a class 4 telephone electronic switching system that was the first digital electronic toll switch introduced by Western Electric for long-distance switching. It was introduced in Chicago in January 1976, to replace the 4A crossbar switch. [1]

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   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

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8. Ohmmeter - Wikipedia

   en.wikipedia.org/wiki/Ohmmeter

   An analog ohmmeter. An ohmmeter is an electrical instrument that measures electrical resistance (the opposition offered by a circuit or component to the flow of electric current). Multimeters also function as ohmmeters when in resistance-measuring mode. An ohmmeter applies current to the circuit or component whose resistance is to be measured.

9. New details emerge about Luigi Mangione, the man accused of ...

   www.aol.com/news/details-emerge-man-accused...

   Get organizers for all of your Christmas decorations on sale now for as low as $10 AOL This foldable storage shelf is on sale for under $60: 'It is like a magic act'