Non-Ohmic Device Study: I-V Graphs and Light Bulb Analysis

[negat1ve]

For a lab yesterday we recorded points to plot the I-V graphs for a few resistors and a light bulb. The light bulb was supposed to show that some that some devices don't obey ohms law but when plotting the graph I am cutting more of a straight line then a curve showing that it DOES! Could this be because are voltage and current results came from a low power source that only dimly lit the bulb not giving it a chance to heat up? Or is this an error? How do i report this result>

 

[LowlyPion]

For a lab yesterday we recorded points to plot the I-V graphs for a few resistors and a light bulb. The light bulb was supposed to show that some that some devices don't obey ohms law but when plotting the graph I am cutting more of a straight line then a curve showing that it DOES! Could this be because are voltage and current results came from a low power source that only dimly lit the bulb not giving it a chance to heat up? Or is this an error? How do i report this result>

Well for low current the filament won't heat much, so you won't read much difference. But if it is glowing at least it is pretty hot. If you put a resistor in series with the bulb you can measure the voltage across that with the bulb and without the bulb. Then you could measure the bulb alone with very low current of the voltmeter and demonstrate that its heated R is greater than its cold R.

 

[nlightner]

Based on your description, it seems that the results from your experiment do not align with the expected behavior of a non-Ohmic device like a light bulb. It is possible that the low power source used in the experiment did not provide enough energy for the light bulb to heat up and exhibit its non-Ohmic behavior. This could be considered an error in the experiment, as the conditions necessary for the non-Ohmic behavior were not met.

In order to accurately report this result, it would be important to include all relevant details, such as the power source used, the conditions of the experiment, and any potential sources of error. It may also be helpful to repeat the experiment with a higher power source to see if the results change. Additionally, further research and analysis could be done to better understand the behavior of the light bulb and determine the cause of the unexpected results. Overall, it is important to accurately and objectively report all results, even if they do not align with initial expectations.