ScienceScene.com PHSA 1050 Topic 9 Lab April 2023 Part E - Using Ohm's Law & = IR Section 1 - How can we measure voltage, current, and resistance? Resistance Coils Description A or 1 B or 2 C or 3 D or 4 E or 5 Length 10m 10m 20m 20m 10m Wire Diameter (Gauge) 22 28 22 28 22 Substance Copper Copper Copper Copper German Silver Voltage (Volts) Current (Amperes) Resistance (Ohms) Note: Number 22 gauge wire has twice the diameter of number 28 gauge wire. Section 2 - Does resistance depend on length? 1. (1) Compare the resistance for coils A and C. 2. (2) What is the effect of length on resistance? 3. (3) Compare the resistance for coils B and D. Section 3 - Does resistance depend on diameter? 1. (1) Compare the resistance for coils A and B. 2. (2) What is the effect of diameter on resistance? 3. (3) Compare the resistance for coils C and D. Section 4 - Does resistance depend on the kind of material? 1. (1) Compare coils A and E. 2. (2) What is the effect of material on resistance