Physics, 17.03.2020 04:08 savjk74

Analyzing the Light Bulb: You should have noticed that the light bulb doesn't have a single well-defined "resistance," since the current vs. voltage plot is nonlinear. Nevertheless, one can define a "voltage-dependent resistance" as R(V)=V/I(V)as the ratio of voltage to current.1Basic Behavior: According to your data, does this resistance increase or decrease with voltage? A reasonable (and correct) thought is that the impact is really with temperature, as the light bulb heats up with more power going into it. How does your data imply resistance varies with temperature?Thermal Expansion: One hypothesis you might have is that the reason is that the resistor expands slightly with increased temperature (since most materials do), and hence the cross-sectional area and length of the resistor change. Supposing the resistor increases in size by the same factor in every direction, what direction does the resistance change? (I. e., does the resistance get larger or smaller?) Is this the direction that you expect based on your answer to the previous part?

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Analyzing the Light Bulb: You should have noticed that the light bulb doesn't have a single well-def...