Discuss your observations with this simple circuit and how changing the potentiometer knob affects the lightbulb. Hypothesize about what the potentiometer could be doing the circuit.

Show how your data demonstrates the validity of Ohm's Law. Include your table of data plot, fits, and any mathematical derivations you find relevant. Do this for both methods explored in the lab.

• Articulate the difference between resistors in parallel and in series.
• Show, based on your measurements, that the rules for resistance addition are true: $$R_{1+2} = R_1 + R_2 \;\; \textrm{in series}$$ $$\frac{1}{R_{1+2}} = \frac{1}{R_1}+\frac{1}{R_2} \;\; \textrm{in parallel}$$
• Use Ohm's Law to show that the currents passing through each resistor for the parallel circuit match or are close to your measured values.