Alternating-Current LR Circuits
PHY 201 & 231
Lab PDF 1Lab PDF 2
Based on Loyd #36. In this experiment, students will measure the voltage across a resistor, an inductor, and a sine-wave generator (all in series) in order to determine the phase angle of the generator current relative to the generator voltage. They will also calculate the values of pure inductor L and pure resistance r for an unknown inductor. This experiment demonstrates the relative phase angle of the voltage across each of the circuit elements. It also shows the students that real inductors consist of both inductance and resistance, and therefore inductors can be represented by a pure inductor L in series with pure resistance r.
Equipment
| Name | Location | Quantity |
| Multimeter, Digital - Sperry Handheld 9V | JE-105A- S59 | 1 per table |
| Compass, Drawing | JE-105A-D95 | 2 per table |
| Function Generators, Digital | JE-105A-S63 | 1 per table |
| Protractor | JE-105A-D90 | 2 per table |
| Inductance, Decade Box (Model 22) | JE-105A-S53 | 1 per table |
| Inductance, Decade Box (Model 32) | JE-105A-S53 | 1 per table |
| Wire, Assorted | JE-105A-S69,147,149 | 3 per table |
| Patch Cords | JE-Lab Rooms-ByChalkboard | 2 per table |
| Resistance, Decade Box (Central Scientific Co. Cat | JE-105A-S51 | 1 per table |
| Connectors, BNC To Banana Plug | JE-105A-S58 | 2 per table |
Notes
Only two of the four inductance decade boxes models can be used in this experiment - models 22 and 32. Only one of these two models is needed for each table.
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