{"id":21300,"date":"2024-03-07T07:50:59","date_gmt":"2024-03-07T02:20:59","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=21300"},"modified":"2025-04-06T11:13:30","modified_gmt":"2025-04-06T05:43:30","slug":"fouriers-law","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/fouriers-law\/","title":{"rendered":"What is Fourier\u2019s Law?"},"content":{"rendered":"<h2>About Fourier\u2019s Law<\/h2>\n<ul>\n<li>Fourier\u2019s law, or\u00a0Law of Heat Conduction, describes\u00a0how heat is transferred,\u00a0or conducted, through solid materials.<\/li>\n<li>As\u00a0molecules vibrate and electrons shuttle about, the\u00a0heat diffuses from the hotter end of an object\u00a0to the colder end.<\/li>\n<li>It\u00a0states that the\u00a0rate of heat conduction through a plane layer is\u00a0proportional to the temperature gradient across the layer\u00a0and the\u00a0heat transfer area of the layer.<\/li>\n<li>Basically, it is an empirical relation between the rate of heat conduction, heat transfer, and temperature gradient in the direction of heat flow.<\/li>\n<li>Formula: q = &#8211; k\u25bdT, where,\n<ul>\n<li>q is the heat flux, which is expressed as energy per unit area per unit time.<\/li>\n<li>k is the heat conductivity coefficient (thermal conductivity). The dimension is area per unit time, so typical units for expressing it would be m2\/s.<\/li>\n<li>\u2207T is the temperature gradient (K\/m).<\/li>\n<\/ul>\n<\/li>\n<li>The\u00a0thermal conductivity of the material (k) is also\u00a0known as the proportionality constant that is obtained in the formula. A\u00a0high value of k denotes that\u00a0the material is a good thermal conductor, and easily transfers energy through it.<\/li>\n<\/ul>\n<h2>What is Conduction?<\/h2>\n<ul>\n<li>Conduction is one\u00a0of the three main ways that\u00a0heat energy moves\u00a0from place to place. The other two ways heat moves around are\u00a0radiation and convection.<\/li>\n<li>Conduction is the\u00a0process by which heat energy is transmitted through collisions between neighboring atoms or molecules.<\/li>\n<li>Conduction\u00a0occurs more readily in solids and liquids,\u00a0where the\u00a0particles are closer together, than in gases, where particles are further apart.<\/li>\n<li>Anything that involves direct physical contact to transfer heat is an example of conduction.<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1) What is convection?<\/h3>\n<p>Convection is a mode of heat transfer that occurs when heat is carried through a fluid (liquid or gas) due to its movement.In free convection, air or water moves away from the heated body as the warm air or water rises and is replaced by a cooler parcel of air or water. In forced convection, air or water is forcibly moved across the body surface (such as in wind or wind-generated water currents) and efficiently removes heat from the body.<\/p>\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.sciencealert.com\/startling-exception-discovered-to-200-year-old-law-of-physics\" target=\"_blank\" rel=\"nofollow noopener\"><u>Startling Exception Discovered to 200-Year-Old Law of Physics<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Fourier\u2019s law, or Law of Heat Conduction, describes how heat is transferred, or conducted, through solid materials.<\/p>\n","protected":false},"author":5,"featured_media":21301,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-21300","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/21300","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=21300"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/21300\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/21301"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=21300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=21300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=21300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}