Chapter Questions
The graph of voltage versus current for the nonohmic resistor was not a straight line. Describe what happened to the current as the voltage increased, compared to what happened for the ohmic resistor.
Why does the graph for the nonohmic resistor "loop"? (Hint: What happens to the lightbulb filament as the current increases?)
Describe what is happening to the resistance of the lightbulb as the voltage increases. (Hint: Look at the graph in segments, and treat each segment as though it were a straight line with slope equal to the resistance.)