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Unformatted text preview: 2RCord + VCord/Cable 114V = 12A x 2RCord + 111V RCord = 0.125 Ω The measured RCord is 45% greater than what we initially calculated. The increased resistance value could be due to the rising temperature of the wire when it conducts current. As the wire heats up (due to Joule heating), electrons undergo more collisions, causing the resistance of the wire to also increase. For copper, this causes a resistance increase of about 0.4% per Kelvin. In addition, the connection between the plug and the receptacle is not perfect, and introduces some contact resistance. To find RCube, we have: VSupply = I x (2RCube + 2RCord + 2RCable + RCar) =...
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This note was uploaded on 06/25/2013 for the course ECE 100 taught by Professor Pister during the Spring '13 term at University of California, Berkeley.
- Spring '13