Contents
Cal Poly Pomona
BroncoDirect Campus Map University Library

Physics Demonstrations at Cal Poly Pomona

Demo Index:
    EM-D-RT
Pira Index:
    5D 20.30
Title:
    RESISTANCE VS. TEMPERATURE
Description:
    Demonstrates the relationship between voltage and current through a light bulb.
Equipment:
    1. Variac
    2. 2 Fluke DMM
    3. Ohm’s Law light bulb apparatus
    4. 100 and 60 watt light bulb
    5. 2 pairs of probe leads
Procedure:
    1. Set up equipment as shown.
    2. For several different settings on the variac, measure the voltage and current in the circuit.
    3. Calculate the R of each voltage setting. (R=V/ I)
    4. Repeat for a bulb of different wattage.