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damon669
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Homework Statement
https://www.physicsforums.com/attachment.php?attachmentid=60570&stc=1&d=1375128608
Thew circuit shows a 10KΩ potentiometer with a 5KΩ load. determine the position of the slider on the 'pot' when tthe voltage across points 'XX' is 3V
Homework Equations
The Attempt at a Solution
Vi=IR
I=V/R = 12/10x10^3 = 0.0012A = 1.2mA
Vo=IR
I=Vo/Io = 3/5x10^3 = 0.0006A = 0.6mA
Vi/Ri+Ro = 9/10x10^3 + 5x10^3 = 0.6mA
VD Across Ri =Vi =RiVi/Ri+Ro = RiVi/R