Physics Demonstrations at Cal Poly Pomona
Demo Index:
Pira Index:
Title:
Description:
Allows a comparison of resistance when the length, thickness, and material of a wire are each varied.
Equipment:
1. Demo multimeter (use CPK# 90259)
2. Resistance coil set
3. 2 B-B leads
Procedure:
1. Connect BB leads to the meter at O and com. Push the button just above these connections to read ohms.
2. Connect the leads to the 10m copper wire and read the resistance. Move the lead to the 20m copper wire for comparison.
3. Compare the 10m 22 gauge copper wire w/ the 10m 28 gauge copper wire.
4. Compare the 10m 22 gauge copper wire and the 10m 22 gauge nickel silver wire.
