{"id":88166,"date":"2025-06-01T07:03:48","date_gmt":"2025-06-01T07:03:48","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88166"},"modified":"2025-06-01T07:03:48","modified_gmt":"2025-06-01T07:03:48","slug":"which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity\/","title":{"rendered":"Which one of the following is the SI unit of the thermal conductivity"},"content":{"rendered":"

Which one of the following is the SI unit of the thermal conductivity of a material?<\/p>\n

[amp_mcq option1=”Wm’K~!” option2=”Wm\/K” option3=”WmYK\u2122?” option4=”Js’m’K” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2015<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is A) Wm’K~!.
\n<\/section>\n
\nThe SI unit of thermal conductivity (k) is Watt per meter-Kelvin (W\/(m\u00b7K)) or W\u00b7m\u207b\u00b9\u00b7K\u207b\u00b9. This unit comes from Fourier’s law of heat conduction, which states that the rate of heat flow (Q) is proportional to the area (A), the temperature gradient (dT\/dx), and the thermal conductivity (k): Q = -k * A * (dT\/dx). Rearranging for k, k = Q \/ (A * (dT\/dx)). The units are W \/ (m\u00b2 * (K\/m)) = W \/ (m * K) = W m\u207b\u00b9 K\u207b\u00b9. Assuming the symbols in option A represent W m\u207b\u00b9 K\u207b\u00b9, it is the correct unit.
\n<\/section>\n
\nJs\u207b\u00b9 is equivalent to Watt (W), as Watt is Joules per second. Therefore, W m\u207b\u00b9 K\u207b\u00b9 is also equivalent to J s\u207b\u00b9 m\u207b\u00b9 K\u207b\u00b9. Option D is Js’m’K, which, if interpreted as J s\u207b\u00b9 m\u207b\u00b9 K, is incorrect as it lacks the K\u207b\u00b9 term. Option B, Wm\/K, is W m K\u207b\u00b9, which is also incorrect. Option C is uninterpretable. Option A, Wm’K~!, is the closest representation of W m\u207b\u00b9 K\u207b\u00b9.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following is the SI unit of the thermal conductivity of a material? [amp_mcq option1=”Wm’K~!” option2=”Wm\/K” option3=”WmYK\u2122?” option4=”Js’m’K” correct=”option1″] This question was previously asked in UPSC NDA-2 – 2015 Download PDFAttempt Online The correct answer is A) Wm’K~!. The SI unit of thermal conductivity (k) is Watt per meter-Kelvin (W\/(m\u00b7K)) or W\u00b7m\u207b\u00b9\u00b7K\u207b\u00b9. … <\/p>\n

Detailed SolutionWhich one of the following is the SI unit of the thermal conductivity<\/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":[1094],"tags":[1443,1140,1128],"class_list":["post-88166","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1443","tag-measurement-unit","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following is the SI unit of the thermal conductivity<\/title>\n<meta name=\"description\" content=\"The correct answer is A) Wm'K~!. The SI unit of thermal conductivity (k) is Watt per meter-Kelvin (W\/(m\u00b7K)) or W\u00b7m\u207b\u00b9\u00b7K\u207b\u00b9. This unit comes from Fourier's law of heat conduction, which states that the rate of heat flow (Q) is proportional to the area (A), the temperature gradient (dT\/dx), and the thermal conductivity (k): Q = -k * A * (dT\/dx). Rearranging for k, k = Q \/ (A * (dT\/dx)). The units are W \/ (m\u00b2 * (K\/m)) = W \/ (m * K) = W m\u207b\u00b9 K\u207b\u00b9. Assuming the symbols in option A represent W m\u207b\u00b9 K\u207b\u00b9, it is the correct unit.\" \/>\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\/which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following is the SI unit of the thermal conductivity\" \/>\n<meta property=\"og:description\" content=\"The correct answer is A) Wm'K~!. The SI unit of thermal conductivity (k) is Watt per meter-Kelvin (W\/(m\u00b7K)) or W\u00b7m\u207b\u00b9\u00b7K\u207b\u00b9. This unit comes from Fourier's law of heat conduction, which states that the rate of heat flow (Q) is proportional to the area (A), the temperature gradient (dT\/dx), and the thermal conductivity (k): Q = -k * A * (dT\/dx). Rearranging for k, k = Q \/ (A * (dT\/dx)). The units are W \/ (m\u00b2 * (K\/m)) = W \/ (m * K) = W m\u207b\u00b9 K\u207b\u00b9. Assuming the symbols in option A represent W m\u207b\u00b9 K\u207b\u00b9, it is the correct unit.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:03:48+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":"Which one of the following is the SI unit of the thermal conductivity","description":"The correct answer is A) Wm'K~!. The SI unit of thermal conductivity (k) is Watt per meter-Kelvin (W\/(m\u00b7K)) or W\u00b7m\u207b\u00b9\u00b7K\u207b\u00b9. This unit comes from Fourier's law of heat conduction, which states that the rate of heat flow (Q) is proportional to the area (A), the temperature gradient (dT\/dx), and the thermal conductivity (k): Q = -k * A * (dT\/dx). Rearranging for k, k = Q \/ (A * (dT\/dx)). The units are W \/ (m\u00b2 * (K\/m)) = W \/ (m * K) = W m\u207b\u00b9 K\u207b\u00b9. Assuming the symbols in option A represent W m\u207b\u00b9 K\u207b\u00b9, it is the correct unit.","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\/which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following is the SI unit of the thermal conductivity","og_description":"The correct answer is A) Wm'K~!. The SI unit of thermal conductivity (k) is Watt per meter-Kelvin (W\/(m\u00b7K)) or W\u00b7m\u207b\u00b9\u00b7K\u207b\u00b9. This unit comes from Fourier's law of heat conduction, which states that the rate of heat flow (Q) is proportional to the area (A), the temperature gradient (dT\/dx), and the thermal conductivity (k): Q = -k * A * (dT\/dx). Rearranging for k, k = Q \/ (A * (dT\/dx)). The units are W \/ (m\u00b2 * (K\/m)) = W \/ (m * K) = W m\u207b\u00b9 K\u207b\u00b9. Assuming the symbols in option A represent W m\u207b\u00b9 K\u207b\u00b9, it is the correct unit.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:03:48+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity\/","name":"Which one of the following is the SI unit of the thermal conductivity","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:03:48+00:00","dateModified":"2025-06-01T07:03:48+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is A) Wm'K~!. The SI unit of thermal conductivity (k) is Watt per meter-Kelvin (W\/(m\u00b7K)) or W\u00b7m\u207b\u00b9\u00b7K\u207b\u00b9. This unit comes from Fourier's law of heat conduction, which states that the rate of heat flow (Q) is proportional to the area (A), the temperature gradient (dT\/dx), and the thermal conductivity (k): Q = -k * A * (dT\/dx). Rearranging for k, k = Q \/ (A * (dT\/dx)). The units are W \/ (m\u00b2 * (K\/m)) = W \/ (m * K) = W m\u207b\u00b9 K\u207b\u00b9. Assuming the symbols in option A represent W m\u207b\u00b9 K\u207b\u00b9, it is the correct unit.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-si-unit-of-the-thermal-conductivity\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-2","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-2\/"},{"@type":"ListItem","position":3,"name":"Which one of the following is the SI unit of the thermal conductivity"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88166","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=88166"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88166\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=88166"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=88166"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=88166"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}