Ohm's Law & Carbon Filament Light Bulbs

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SUMMARY

Carbon filament light bulbs do adhere to Ohm's Law, but it is crucial to recognize that the resistance of the filament changes with temperature. While tungsten is the primary material used in modern light bulbs, the principles of Ohm's Law apply as long as the current changes are minimal, allowing for a constant resistance. Understanding the relationship between temperature and resistance is essential for accurate applications of Ohm's Law in this context.

PREREQUISITES
  • Understanding of Ohm's Law
  • Knowledge of electrical resistance and its temperature dependence
  • Familiarity with materials used in light bulb filaments, particularly tungsten
  • Basic principles of electrical circuits
NEXT STEPS
  • Research the temperature coefficient of resistance for tungsten
  • Explore the differences between carbon and tungsten filaments in light bulbs
  • Learn about the practical applications of Ohm's Law in electrical engineering
  • Investigate the impact of temperature on electrical components
USEFUL FOR

Students of physics, electrical engineers, and anyone interested in the principles of electricity and the functioning of light bulbs.

nishant
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carbon filament in a light bulb does obey the ohm's law right?
 
Physics news on Phys.org
To the best of my knowledge, light bulb filaments are tungsten. Yes, they adhere to Ohms law, as long as you understand that the Resistance may change with temperature. If you are looking at small changes in current, then the resistance will be constant.
 

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