Investigation of resistance of Lightbulb

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SUMMARY

This discussion focuses on investigating the factors affecting the resistance of a 24W lightbulb. The user has created a voltage versus resistance graph but is advised by peers to plot current against voltage instead. The user seeks clarity on how watts influence resistance and expresses a need for precise and reliable data collection using basic equipment, including a power pack, filament lightbulb, wire, variable resistor, and two multimeters. The conversation emphasizes the importance of accurate measurements for achieving high grades in the investigation.

PREREQUISITES
  • Understanding of electrical resistance and Ohm's Law
  • Familiarity with the concept of watts and power in electrical circuits
  • Basic knowledge of using multimeters for measuring voltage and current
  • Experience with experimental design and data collection methods
NEXT STEPS
  • Research the relationship between power (watts) and resistance in electrical components
  • Learn how to accurately use multimeters to measure voltage and current
  • Explore methods for improving precision and reliability in experimental data collection
  • Investigate the significance of plotting current against voltage in electrical experiments
USEFUL FOR

Students conducting physics experiments, educators teaching electrical concepts, and anyone interested in understanding the factors affecting electrical resistance in lightbulbs.

chipsnfish
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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
 
Physics news on Phys.org
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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