Ohm's Law & Carbon Filament Light Bulbs

In summary, Ohm's Law states that the current through a conductor is directly proportional to the voltage across it. This applies to carbon filament light bulbs, where as the voltage increases, so does the current, causing the filament to heat up and produce light. However, due to their low efficiency and high heat production, carbon filament light bulbs are becoming less common and being replaced by more energy-efficient options. Ohm's Law can be applied to all types of light bulbs, but the specific characteristics may affect the exact values. Additionally, the resistance of a carbon filament light bulb increases as the temperature increases due to increased vibrations of the atoms in the filament.
  • #1
nishant
95
0
carbon filament in a light bulb does obey the ohm's law right?
 
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  • #2
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.
 
  • #3


Yes, carbon filament in a light bulb does obey Ohm's Law. Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them. In a carbon filament light bulb, the filament acts as the conductor and the voltage across the two points (the ends of the filament) remains constant, so the current through the filament is directly proportional to the resistance of the filament. As the resistance of the filament increases with temperature, the current also decreases, resulting in a decrease in the brightness of the bulb. This relationship between current, voltage, and resistance in a carbon filament light bulb is in accordance with Ohm's Law.
 

1. What is Ohm's Law?

Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points. This means that as the voltage increases, the current also increases, and vice versa.

2. How does Ohm's Law relate to carbon filament light bulbs?

In carbon filament light bulbs, the filament is the conductor that allows electricity to flow. According to Ohm's Law, as the voltage increases, the current through the filament also increases, causing it to heat up and produce light.

3. Why are carbon filament light bulbs becoming less common?

Carbon filament light bulbs have a low efficiency and produce a lot of heat, making them less energy-efficient than other types of light bulbs. As a result, they are being phased out in favor of more energy-efficient options such as LED bulbs.

4. Can Ohm's Law be applied to other types of light bulbs?

Yes, Ohm's Law can be applied to all types of light bulbs, as it is a fundamental law of electricity and relates to the flow of current through a conductor. However, the specific characteristics of each type of light bulb may affect the exact values of voltage and current.

5. How does temperature affect the resistance of a carbon filament light bulb?

The resistance of a carbon filament light bulb increases as the temperature increases. This is because the higher temperature causes the atoms in the filament to vibrate more, making it more difficult for electrons to flow through, and increasing the overall resistance of the bulb.

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