Is A Light Bulb A Resistor?

No doubt, it’s impossible to light up your homes without a light bulb. For sure, the light bulb was one of the greatest inventions, and we should appreciate our scientists for it. Not only in the houses, but we use the lights bulbs almost in every place for better vision or visibility.

Fortunately, it’s super easy to perform our tasks in even the nights just because of the bulb. So, it is one of the most efficient things necessary for our regular lives.

Well, our main question is light bulb a resistor? If you are also there for the answer to this question. We will try our best to share all the details about this fact. Anyhow, the light bulb is not a traditional resistor. However, it behaves like a resistor because of the limited flow of electrons.

Indeed, the electrons also face resistance when they pass through the bulb and form energy because of it. If we see logically, it’s a true fact that the light bulb is a resistor. For more details, let’s discuss this fact briefly:

Light Bulb Is A Resistor, But Not Exactly:

Before understanding the bulb mechanism, we have to know about a resistor. So, we can understand why the light bulb is exactly not a resistor. However, it acts as a resistor. Basically, resistors offer resistance against the flow of electrons. So, one can limit the flow of current in the appliances and electrical circuits.

But you have to know more about this fact. For this, you have to know about Ohm’s law. So, you can understand the appropriate flow of electric current and electrons in the circuits.

For this, nothing would be a better option than following Ohm’s formula to calculate the proper flow of electrons in a circuit or electric bulb.

If there is an increase in the voltage, the current will surely increase but linearly in the circuit. No matter what the current flow or ratio in the circuit, the resistor holds its value appropriately. If the resistor is non-ohmic, it doesn’t follow the increase or decrease in the voltage accordingly.

However, the overall resistance depends on the type of material and the amount of current passing through the material.

When Do The Light Bulb Act Like A Resistor?

After a complete discussion about the resistor in the above paragraph, it would be easy for all of us to know about the Ohmic and non-Ohmic resistor or bulbs. Undoubtedly, the light bulb is not a traditional resistor. But only act as a resistor in a few cases.

Because of the presence of filaments, most bulbs form some kind of resistance when the current passes through. Bulb transforms this resistance into heat and energy to light it up. If the bulb is made up of incandescent, it will surely act as a resistor because of higher resistance.

However, the rate of resistance and heat will increase in the incandescent bulbs in the case of higher voltages. If you apply the greater voltage to the light bulb, it will surely create more heat and energy with lower resistance.

On the other hand, the bulb acts as a resistor because of the presence of a coil in it. In the case of wounds, the resistance will increase in the coil.

Do We Consider The Light Bulb As A Resistor?

Of course, yes! We can use the light bulb as a resistor according to Ohm’s law in the electric circuits. According to the above discussion, the light bulb is surely not a traditional or conventional resistor. However, we can use it in the electric circuits instead of resistors to control the current overflow.

Excitingly! We can perform the same job with a light bulb instead of using a resistor. In this way, we can light up the bulb with extra heat and energy than wasting it.

On the other hand, you have to avoid using the light bulb in a circuit as a resistor. The reason is that the current flow will not remain constant in the bulb as a resistor.

So, it might be harmful to your circuit. Consequently, the resistance of the light bulb also varies according to the varying heat or voltage. That’s why a light bulb is not an ideal option as a resistor. Now, it’s up to you to either use the bulb in the circuit or a resistor to control the voltage variations.

Replace The Light Bulb Resistor With LED:

You can use the light bulb as a resistor in the circuit but at your own risk. The reason is that the light bulb resistor behaves differently in different cases and scenarios. So, it’s not a safe option to go for a bulb for a large circuit as a resisting item.

For this, nothing would be a better option than replacing the light bulb with an LED. No doubt, the resisting power of an LED is lower than a bulb. But it doesn’t damage the circuit in case of fluctuation.

Ideally, the heat dissipation level in the LED is the same as the bulb. So, it would be the best and the most efficient alternative to the bulb in the electric circuit.

Which Type of Light Bulb Is A Suitable Resistor?

If the light bulb consists of Tungsten material, it will surely act as a resistor. However, it’s not suitable to use the traditional bulbs in the circuit as resistors. The reason is that those bulbs don’t include the Tungsten material. They are made up of carbon paper and Bamboo. If you are using these conventional bulbs in the circuits, do it at your own risk.

Moreover, the presence of Carbon material in the bulb creates the negative temperature coefficient of resistance. In this case, the temperature increases, but the resistance decreases. Unfortunately, this sudden decrease in resistance may cause power fluctuation and harm the circuit.

Final Verdict:

In short, if you wanna use the bulb as a resistor in an electric circuit, do it after knowing the material type of bulb. If you are using conventional bulbs as resistors, it is not safe for the circuit. However, if Tungsten material is present in the bulb, go ahead and use it as a resistor. Moreover, the bulb performance as a resistor also depends on the number of electrons and the amount of voltage pass through it.

Also read: Where To Put Screws On Metal Roof?

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