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Why do bulb filament not burn?
The filament does not "burn", it just glows brightly. If some air were present in the bulb - as sometimes happens if a light bulb gets knocked and gets even a tiny crack in its glass bulb - then the oxygen present in ordinary air will quickly make the filament burn away.For more information see the answer to the Related question sghown below.
Why does the filament produce light?
The filament in a light bulb produces light when an electric current passes through it. This causes the filament to heat up and glow, emitting visible light as a result of its high temperature. This process is known as incandescence.
Why is a bulb most likely to fail when the current is first switched on?
Light bulb filaments glow rather than burn because of the lack of oxygen within the vacuum of the bulb. Over time, the heating and contracting of the filament and the glass surrounding it creates a leak in the base of the bulb causing the vacuum to be lost and allowing oxygen to enter the bulb. It is during the contracting phase, which happens as the bulb cools after being turned off, that eventually the seal is lost. When this happens, oxygen is allowed to enter and the next time the bulb is turned on, the filament, now exposed to the oxygen, burns out.
What happens to the temperature of the filament?
The temperature of a filament increases when an electric current passes through it due to the resistance it encounters. As the current flows, the filament converts electrical energy into thermal energy, causing it to heat up. If the current is sustained, the filament can reach very high temperatures, often resulting in visible light emission, as seen in incandescent bulbs. However, if the temperature exceeds the material's melting point, the filament may burn out or break.
Why is a filament bulb not filled with oxygen?
Light in a lightbulb is produced by running a current through a wire with a high resistance. This creates a lot of heat, which when hot enough creates light. Imagine heating up a piece of steel until it glows. If the bulb was filled with oxygen, the tungsten filament would burn before it ever got to hot enough temperatures for our light needs. Therefore, we use argon so that while it gets hot, it doesn't burst into flames. Simple, really.
Why does the filament in a light bulb not burn up immediately?
The 'Filament' of a lightbulb is a peice of metal with an unusually high melting
What is the temperature of bulb filament when it is burning?
The temperature of a bulb filament when it is burning can range from 2,000 to 3,000 degrees Celsius (3,600 to 5,400 degrees Fahrenheit), depending on the type of bulb and the amount of electric current passing through it. This high temperature causes the filament to glow and produce light.
What temperature is the filament inside a working electric bulb?
The temperature of the filament inside a working electric bulb can reach up to around 2,500 to 3,000 degrees Celsius. This high temperature is what allows the filament to emit light and heat up the surrounding area in an incandescent light bulb.
Why does the filament of a light bulb not burn?
The filament of a light bulb does not burn because it is made of a material, typically tungsten, that has a high melting point and is able to withstand the high temperatures generated by the electric current passing through it. Additionally, the filament is enclosed in a vacuum or inert gas to prevent it from reacting with oxygen and burning up.
Which gas in the air burn's out the filament?
Oxygen is the gas in the air that burns out the filament in an incandescent light bulb. When the filament reacts with oxygen at high temperatures, it oxidizes and eventually burns out.
Why do you use Argon in a light bulb instead of oxygen?
The current flowing through the filament causes it to heat to a very high temperature - so high that is becomes incandescent (glows) and gives light. If the bulb was filled with oxygen then, at those high temperatures, the filament would oxidise - burn out - and the bulb would be "blown".
Which has the thickest filament - a high-resistance or a low-resistance bulb?
A high-resistance bulb typically has a thicker filament compared to a low-resistance bulb. The thicker filament in a high-resistance bulb can withstand the greater heat generated by the increased resistance, resulting in a longer lifespan for the bulb.
How the bulb light?
An electrical current is passed through the high resistance filament in the bulb, causing it to become white hot and so give off light. The inside of the bulb is filled with an inert gas, such as nitrogen, so the filament does not burn up .
How bulb light?
An electrical current is passed through the high resistance filament in the bulb, causing it to become white hot and so give off light. The inside of the bulb is filled with an inert gas, such as nitrogen, so the filament does not burn up .
How does the filament inside a light bulb produce light when electricity passes through it?
When electricity passes through the filament inside a light bulb, it heats up the filament to a very high temperature. This causes the filament to glow and emit light, a process known as incandescence.
Why does a filament light bulb stay at a constant temperature of 2500 degrees?
A filament light bulb reaches a high temperature of around 2500 degrees Celsius due to the electrical current passing through the filament, causing it to resist the flow of electricity and heat up. The constant temperature is maintained because the heat generated is balanced by the cooling effect of the surrounding gas inside the bulb, preventing the filament from overheating.
What happens to the filament if the bulbs becomes brighter and brighter?
The bulb gets brighter because the filament is getting hotter. If the filament's temperature gets too high it will melt at some point and fall apart. The current will stop flowing and the bulb will "blow".
