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Potentiometers
Usages      CW                     CW R2            R210K            10K         Voltage Sampling                     CCW ...
R3                                 CW    R             (fully CW) =               1K                          t ot al     ...
R3                                              A                                              CW                     1K  ...
R3                                       CW    R             (fully CW) = 5K               1K                             ...
R3                                                 A                                                 CW                   ...
R3                                                                     CCW                                    2K          ...
R3                                                          A                                                             ...
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Potentiometers

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Potentiometers

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Potentiometers

  1. 1. Potentiometers
  2. 2. Usages CW CW R2 R210K 10K Voltage Sampling CCW CCW
  3. 3. R3 CW R (fully CW) = 1K t ot al R t ot al (fully CCW) = R275V 10K I t ot al (R2 fully CW) = CCW I (R2 fully CCW) = R1 t ot al E (R2 fully CW) = R1 4K E (R2 fully CCW) = R1 P (R2 fully CW) = T E (R2 fully CW) = r2 P (R2 fully CCW) = T E (R2 fully CCW) = R2 P (R2 fully CW) = R1 E (R2 fully CW) = R3 P (R2 fully CCW) = R1 E (R2 fully CCW) = R3 P (R2 fully CW) = R2 P (R2 fully CCW) = R2 P (R2 fully CW) = R3 P (R2 fully CCW) = R3
  4. 4. R3 A CW 1K R2 10K Voltage Sampling 75V CCW R1 B Voltage at Point “A” = 4K R (fully CW) = t ot al Voltage at Point “B” R t ot al (fully CCW) =P (R2 fully CW) = T Sample Voltage range is _______V to ______V I (R2 fully CW) =P (R2 fully CCW) = t ot al T when the adjustment is made from the fully I t ot al (R2 fully CCW) =P (R2 fully CW) = R1 CCW position to the fully CW position. E (R2 fully CW) = R1P (R2 fully CCW) = R1 The potentiometer is connected so that the E (R2 fully CCW) = R1P (R2 fully CW) = R2 voltage sampled increases when the adjustment E (R2 fully CW) = is turned CW. If the potentiometer was not R2P (R2 fully CCW) = R2 E (R2 fully CCW) = R2 wired correctly so that the CW and CCWP (R2 fully CW) = R3 E (R2 fully CW) = R3 rotation were reversed, would a differenceP (R2 fully CCW) = R3 E (R2 fully CCW) = R3 in voltage sampling occur? __________
  5. 5. R3 CW R (fully CW) = 5K 1K t ot al R t ot al (fully CCW) = 15K R275V 10K I t ot al (R2 fully CW) = .015A CCW I (R2 fully CCW) = .005A R1 t ot al E (R2 fully CW) = 60V R1 4K E (R2 fully CCW) = 20V R1 P (R2 fully CW) = 1.125W T E (R2 fully CW) = 0V r2 P (R2 fully CCW) = .375W T E (R2 fully CCW) = 50V R2 P (R2 fully CW) = .9W R1 E (R2 fully CW) = 15V R3 P (R2 fully CCW) = .1W R1 E (R2 fully CCW) = 5V R3 P (R2 fully CW) = 0W R2 P (R2 fully CCW) = .25W R2 P (R2 fully CW) = .225W R3 P (R2 fully CCW) = .025W R3
  6. 6. R3 A CW 1K R2 10K Voltage Sampling 75V CCW R1 B Voltage at Point “A” = 4K R (fully CW) = 15K t ot al Voltage at Point “B” R t ot al (fully CCW) = 15KP (R2 fully CW) = .375W T Sample Voltage range is _______V to ______V I (R2 fully CW) = .005AP (R2 fully CCW) = .375W t ot al T when the adjustment is made from the fully I t ot al (R2 fully CCW) = .005AP (R2 fully CW) = .1W R1 CCW position to the fully CW position. E (R2 fully CW) = 20V R1P (R2 fully CCW) = .1W R1 The potentiometer is connected so that the E (R2 fully CCW) =20V R1P (R2 fully CW) = .225W R2 voltage sampled increases when the adjustment E (R2 fully CW) = 50V is turned CW. If the potentiometer was not R2P (R2 fully CCW) = .225W R2 E (R2 fully CCW) = 50V R2 wired correctly so that the CW and CCWP (R2 fully CW) = .05W R3 E (R2 fully CW) = 5V R3 rotation were reversed, would a differenceP (R2 fully CCW) = .05W R3 E (R2 fully CCW) = 5V R3 in voltage sampling occur? __________
  7. 7. R3 CCW 2K R2 20V 1K R1 CW 1K1. Build the circuit shown above, and:2. Rotate R2 adjustment knob fully CCW (counter clockwise); measure the circuit current and recor d the reading.3. With R2 adjusted fully CCW, measure the voltage drops across the resistors and record the readi ngs.4. Rotate R2 to fully CW (clockwise) and measure the current; record the reading.5. With R2 adjusted fully CW, measure and record the voltage drops across the resistors. I E R1 E R2 E R3 R2 CCW R2 CW
  8. 8. R3 A CCW 2K R2 20V 1K C R1 CW B 1K1. Construct the circuit shown above.2. Perform steps 2 through 5 in the previous trial. I E R1 E R2 E R3 R2 CCW R2 CWSet R2 fully CCW Measure the voltage at point A __________; measure the voltage at point B ___________.Set R2 fully CW Measure the voltage at point A __________; measure the voltage at point B ___________.Measure the voltage at point C and note the voltage as R2 is adjusted. What are the minimum and maximum voltages measured and what do they relate to previously measured?

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