{"id":84741,"date":"2025-06-01T02:48:05","date_gmt":"2025-06-01T02:48:05","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=84741"},"modified":"2025-06-01T02:48:05","modified_gmt":"2025-06-01T02:48:05","slug":"why-is-argon-gas-used-along-with-tungsten-wire-in-an-electric-bulb","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/why-is-argon-gas-used-along-with-tungsten-wire-in-an-electric-bulb\/","title":{"rendered":"Why is argon gas used along with tungsten wire in an electric bulb?"},"content":{"rendered":"

Why is argon gas used along with tungsten wire in an electric bulb?<\/p>\n

[amp_mcq option1=”To increase the life of the bulb” option2=”To reduce the consumption of electricity” option3=”To make the emitted light colored” option4=”To reduce the cost of the bulb” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-1 – 2018<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nArgon gas is used in electric bulbs along with a tungsten filament primarily to increase the life of the bulb. At the high operating temperature of the tungsten filament, tungsten atoms tend to evaporate or sublime. The presence of an inert gas like argon at a certain pressure within the bulb reduces the rate of evaporation of the tungsten filament, making it last longer.
\n<\/section>\n
\n– Tungsten filaments operate at very high temperatures (around 2500-3000\u00b0C) to produce light by incandescence.
\n– High temperatures cause the tungsten metal to sublime (evaporate) from the filament.
\n– Evaporated tungsten atoms deposit on the cooler glass bulb wall, causing blackening.
\n– Sublimation thins the filament over time, eventually causing it to break.
\n– Inert gases like argon, krypton, or xenon, when present at pressure, impede the movement of tungsten atoms away from the filament, reducing the evaporation rate and thus prolonging the filament’s life and preventing rapid blackening of the bulb.
\n<\/section>\n
\nEarly incandescent bulbs were vacuum sealed. Adding inert gas was a significant improvement in bulb technology, leading to longer-lasting and brighter bulbs compared to vacuum bulbs. While the inert gas does cause a slight loss of energy through convection, this is offset by the ability to operate the filament at a slightly higher temperature for improved efficiency and light output, while still significantly increasing bulb lifespan.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Why is argon gas used along with tungsten wire in an electric bulb? [amp_mcq option1=”To increase the life of the bulb” option2=”To reduce the consumption of electricity” option3=”To make the emitted light colored” option4=”To reduce the cost of the bulb” correct=”option1″] This question was previously asked in UPSC CDS-1 – 2018 Download PDFAttempt Online Argon … <\/p>\n

Detailed SolutionWhy is argon gas used along with tungsten wire in an electric bulb?<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1087],"tags":[1114,1160,1128],"class_list":["post-84741","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1114","tag-physical-properties-of-materials","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhy is argon gas used along with tungsten wire in an electric bulb?<\/title>\n<meta name=\"description\" content=\"Argon gas is used in electric bulbs along with a tungsten filament primarily to increase the life of the bulb. At the high operating temperature of the tungsten filament, tungsten atoms tend to evaporate or sublime. The presence of an inert gas like argon at a certain pressure within the bulb reduces the rate of evaporation of the tungsten filament, making it last longer. - Tungsten filaments operate at very high temperatures (around 2500-3000\u00b0C) to produce light by incandescence. - High temperatures cause the tungsten metal to sublime (evaporate) from the filament. - Evaporated tungsten atoms deposit on the cooler glass bulb wall, causing blackening. - Sublimation thins the filament over time, eventually causing it to break. - Inert gases like argon, krypton, or xenon, when present at pressure, impede the movement of tungsten atoms away from the filament, reducing the evaporation rate and thus prolonging the filament's life and preventing rapid blackening of the bulb.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/why-is-argon-gas-used-along-with-tungsten-wire-in-an-electric-bulb\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why is argon gas used along with tungsten wire in an electric bulb?\" \/>\n<meta property=\"og:description\" content=\"Argon gas is used in electric bulbs along with a tungsten filament primarily to increase the life of the bulb. At the high operating temperature of the tungsten filament, tungsten atoms tend to evaporate or sublime. The presence of an inert gas like argon at a certain pressure within the bulb reduces the rate of evaporation of the tungsten filament, making it last longer. - Tungsten filaments operate at very high temperatures (around 2500-3000\u00b0C) to produce light by incandescence. - High temperatures cause the tungsten metal to sublime (evaporate) from the filament. - Evaporated tungsten atoms deposit on the cooler glass bulb wall, causing blackening. - Sublimation thins the filament over time, eventually causing it to break. - Inert gases like argon, krypton, or xenon, when present at pressure, impede the movement of tungsten atoms away from the filament, reducing the evaporation rate and thus prolonging the filament's life and preventing rapid blackening of the bulb.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/why-is-argon-gas-used-along-with-tungsten-wire-in-an-electric-bulb\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T02:48:05+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Why is argon gas used along with tungsten wire in an electric bulb?","description":"Argon gas is used in electric bulbs along with a tungsten filament primarily to increase the life of the bulb. 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The presence of an inert gas like argon at a certain pressure within the bulb reduces the rate of evaporation of the tungsten filament, making it last longer. - Tungsten filaments operate at very high temperatures (around 2500-3000\u00b0C) to produce light by incandescence. - High temperatures cause the tungsten metal to sublime (evaporate) from the filament. - Evaporated tungsten atoms deposit on the cooler glass bulb wall, causing blackening. - Sublimation thins the filament over time, eventually causing it to break. - Inert gases like argon, krypton, or xenon, when present at pressure, impede the movement of tungsten atoms away from the filament, reducing the evaporation rate and thus prolonging the filament's life and preventing rapid blackening of the bulb.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/why-is-argon-gas-used-along-with-tungsten-wire-in-an-electric-bulb\/","og_locale":"en_US","og_type":"article","og_title":"Why is argon gas used along with tungsten wire in an electric bulb?","og_description":"Argon gas is used in electric bulbs along with a tungsten filament primarily to increase the life of the bulb. 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