IMathAS-libretexts

A teacher finds an old lightbulb in a supply room. The teacher asks a student to design a procedure to determine if the lightbulb is ohmic or nonohmic. The student plans to connect the light bulb to batteries of different emf and measure the potential difference across and the current through the lightbulb. Which of the following is the best way to analyze the data to determine if the lightbulb is ohmic or nonohmic?

Averaging all of the values of the potential difference and average all the values of the current and then calculating an overall value for resistance based on the averages
Calculating the resistance for each pair of potential difference and current measurements, and then averaging all of the resistance values
Graphing the potential difference across the lightbulb as a function of current through the lightbulb to see if there is a linear relationship
Graphing the power of the lightbulb as a function of the potential difference across the lightbulb to see if there is a linear relationship

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