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A coiled filament in a light bulb is more energy-efficient than a straight filament because it allows for a longer filament to fit in a smaller space, providing more surface area for light emission. This leads to increased brightness while using the same amount of energy compared to a straight filament.
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Which is more powerful a torch bulb or a mains filament bulb?
Mains filament
Why are fluorescent lamps brighter than filament light bulbs?
Fluorescent lamps are brighter than filament light bulbs because they produce light by exciting mercury vapor and phosphor coating, which emits more visible light compared to the incandescent process of heating a filament wire to produce light. Additionally, fluorescent lamps are more energy-efficient and have a higher luminous efficacy, meaning they produce more light for the amount of energy consumed compared to filament light bulbs.
Why is it better to use tungsten rather than copper as a filament of an electric light bulb?
Tungsten has a higher melting point and is more chemically stable than copper, making it better suited for the high temperatures and chemical environment inside a light bulb. Tungsten also has a higher resistance to heat, which allows it to maintain its structure and emit light efficiently over a longer period compared to copper.
Why is the filament of a light bulb surrounded by glass?
The glass surrounding the filament in a light bulb serves as a protective barrier. It helps to prevent the filament from oxidizing (burning up) when exposed to oxygen in the air, which could cause the filament to fail prematurely. The glass also helps to contain the heat generated by the filament and allows light to pass through while providing structural support for the bulb.
How much of the energy in a filament lamp is lost through heat?
In a filament lamp, most of the energy is lost as heat rather than light. It's estimated that about 90% of the energy is dissipated as heat, while only about 10% is transformed into visible light.
Why are LED flashlights better than halogen flashlights?
The LED bulb, which LED stands for Light Emitting Diode, does not have a filament and therefore lasts longer than a regular lightbulb.
Why Led bulb are better than filament bulbs for maximum reduction in the consumption of electrical energy explain?
LEDs produce visible light and not heat. Filament bulbs use much of their energy to produce heat. The LED bulb produces more light per watt consumed.
Does a lamp with a thick filament draw more current or less current than a lamp with a thin filament?
A lamp with a thick filament will draw more current. What restricts the current flow in the filament is the resistance of the filament which increases as the temperature of the filament increases. A thin filament requires less energy to get heated up that a thick one so less current to achieve threshold resistance. Also a thick filament provides a broader path for current so there is less resistance per increase in degree centigrade. For these two (closely related but distinct) reasons it will require more current for the filament to get heated up to threshold resistance.
What is the purpose of having a coiled coil in a ligh tbulb?
The purpose of a light bulb is to produce light when the Sun is not shining!Another answerLight bulbs were invented to help people to see things better in gloomy or dark conditions and to be able to see their way if they wanted to go somewhere at night. Having any kind of artificial light - not just light bulbs but flaming torches, oil lamps, etc. - meant people could stay up for longer every evening.Before any kinds of lighting were invented people used to have to go to bed early - especially in the seasons of the year when night time is longer than day time - because, if they stayed up after it got dark, they weren't able to read books or do any work, etc.
Why gases are used in bulbs?
In incandescent bulbs, gases (other than oxygen) prolong the life of the filament. In florescent bulbs, the gas takes the place of the filament.
Does a lamp with a thick filament draw more or less current than a lamp with a thin filament?
A lamp with a thick filament will draw more current. What restricts the current flow in the filament is the resistance of the filament which increases as the temperature of the filament increases. A thin filament requires less energy to get heated up that a thick one so less current to achieve threshold resistance. Also a thick filament provides a broader path for current so there is less resistance per increase in degree centigrade. For these two (closely related but distinct) reasons it will require more current for the filament to get heated up to threshold resistance.
Why is the filament thinner than the copper wire used in circuit wiring?
Filament is thiner than copper hence it dode offers very low resitstance to electric current flowing through it. Therefore heat energy generated with filament during current flow is converted to light. It is possible generate light with lesser power consumption . This lower power requirments is possible due to lesser specific resistance of filament compared to copper.
Is a light bulb filament as hot as lava?
The filament of an incandescent light bulb is actually significantly hotter than lava. Temperatures may exceed 4,000 degrees in some bulbs.
Which is more powerful a torch bulb or a mains filament bulb?
Mains filament
What would happen if the small intestine were just a straight tube rather than a coiled tube?
The digestion process will be difficult
What would happen if the small intestine were just straight tube rather than a coiled tube?
The digestion process will be difficult
Is the brightness of a light bulb determined by its filaments?
Though there is a bit more to the story than this, yes, it is generally true that the brightness of a light bulb, sometimes called a lamp, is a function of its filaments. For a given voltage of operation, a less resistive filament will draw more current, run hotter and will glow more brightly (be more incandescent). A heavier, more resistive filament will draw less current, get less hot, and not produce as much light (be less incandescent). The former will run "hotter" as well as brighter, and the filament won't last as long, though it will be more efficient. The latter will not be quite as bright or as efficient, but the filament will have a longer operating life, and will probably be more shock resistant. Lamp filaments are usually made of tungsten, and these filaments are coiled to reduce evaporation of the metal when that metal is white hot. There is a "balance" engineered into the lamp to make it run "hotter" and more brightly to be more efficient, yet limit current somewhat, limit filament evaporation and extend the life of the lamp. Eventually, enough of the filament evaporates away in normal operation to create a "hot spot" that quickly degrades, and the filament fails. A link can be found below to learn more.
