Investigation of resistance of Lightbulb

AI Thread Summary
The investigation focuses on the factors affecting the resistance of a lightbulb, specifically examining the relationship between voltage and resistance for a 24W lightbulb. There is confusion regarding whether to plot current against voltage instead, despite the goal being to determine resistance factors. The inquiry also seeks clarification on how wattage influences resistance and the definition of watts. Additionally, the need for precise and reliable data is emphasized, with concerns about achieving accuracy using basic equipment like a power pack and multimeters. Reliable methods for data collection are crucial for achieving high grades in the investigation.
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Homework Statement



I am currently carrying out an investigation into all the factors that affect the resistance of a lightbulb. Firstly, I have done a graph to show voltage against resistance for a 24W Lightbulb to see if Watts affect resistance, however my friends and teacher all told me to do it as current against voltage, but what is the point when the investigation is asking me to find out the factors that affect resistance? Also, how does watts affect resistance and what is watts exactly.
Another problem is that I need to have precise and reliable data in order to get the high grades, but I don't know how I can get precision and reliability with just a "power pack, filament lightbulb, wire, variable resistor, two multimeters..."?
Please help, thanks
 
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Welcome to PF.

This lecture might be useful at about 17:20 in, though actually the whole lecture might be helpful.:

https://www.youtube.com/watch?v=cJSp8v0YJrA
 
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