Electrical Resistance & Ohm's Law
PHY 201 & 231
Lab PDF 1Lab PDF 2
Based on Loyd #28. In this experiment, students will measure the current in and the voltage across a wire coil for these objectives: Definition of the concept of electrical resistance of matter using coils of wire as an example. Demonstration of the dependence of the resistance on the length, cross-sectional area, and resistivity of the wire. Demonstration of the equivalent resistance of resistors inseries and in parallel arrangements.
Equipment
| Name | Location | Quantity |
| Resistance Coils | JE-105A-S56 | 1 per table |
| Multimeter, Digital - Sperry Handheld 9V | JE-105A- S59 | 2 per table |
| Power Supply, Extech (Model #382213) | JE-105A-X12 | 1 per table |
| Patch Cords | JE-Lab Rooms-ByChalkboard | 7 per table |
Notes
Put out the Extech power supplies. If there are not enough, use the Sargent-Welch power supplies.
This lab requires laptops. The computer cart containing the laptops can be wheeled by faculty into the lab room.
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