{"id":1561,"date":"2022-12-16T10:00:36","date_gmt":"2022-12-16T04:30:36","guid":{"rendered":"https:\/\/www.aplustopper.com\/?p=1561"},"modified":"2022-12-17T09:47:31","modified_gmt":"2022-12-17T04:17:31","slug":"resistivity","status":"publish","type":"post","link":"https:\/\/www.aplustopper.com\/resistivity\/","title":{"rendered":"What Is Resistivity"},"content":{"rendered":"

What Is Resistivity\u00a0<\/strong><\/h2>\n

\\( R\\propto l \\)
\n\\( R\\propto \\frac{1}{a} \\)
\n\\( \\text{So, }R\\propto \\frac{\\ell }{a} \\)
\n\\( \\text{or }R=\\rho \\times \\frac{\\ell }{a}\\text{ }………\\text{ (i)} \\)
\nwhere \u03c1 (rho) is called resistivity of the material of conductor.
\nIf, \u00a0 \u00a0 \u00a0 \u00a0l = 1 m and a = 1 m2<\/sup>
\nThen \u00a0 \u00a0 \u00a0 \u00a0R = \u03c1 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 …. (ii)
\nThus, if we take 1 metre long piece of a substance having a cross-sectional area of 1 meter2<\/sup>, then the resistance of that piece of the substance is called its resistivity.
\nResistivity of a substance can also be defined as follows
\nThe resistance offered by a cube of a substance having side of 1 metre, when current flows perpendicular to the opposite faces, is called its resistivity.
\nUnits of resistivity<\/strong>
\nFrom equation (i), we can write
\n\\( \\rho =\\frac{R\\times a}{\\ell } \\)
\nSo, SI unit of resistivity (\u03c1)
\n\\( =\\frac{\\text{ohm}\\,\\times \\,{{\\text{m}}^{\\text{2}}}}{\\text{m}}=\\text{ohm}\\text{.m} \\)<\/p>\n

Classification of Materials on Basis of Resistivity<\/strong><\/h2>\n
    \n
  1. Substances showing very low resistivities :<\/strong> The substances which show very low resistivities allow the flow of electric current through them. these type of substances are called conductors.
    \nFor example, copper, gold, silver, aluminium and electrolytic solutions are conductors.<\/li>\n
  2. Substances having moderate resistivity:<\/strong> The substances which have moderate resistivity offer appreciable resistance to the flow of electric current through them. Therefore, such substances are called resistors. For example, alloys such as nichrome, manganin, constantan and carbon are typical resistors.<\/li>\n
  3. Substances having very high resistivity:<\/strong> The substances which have very high resistivities do not allow electricity to flow through them. The substances which do not allow electricity to pass through them are called insulators. For example, rubber, plastics, dry wood, etc. are insulators.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    What Is Resistivity\u00a0 where \u03c1 (rho) is called resistivity of the material of conductor. If, \u00a0 \u00a0 \u00a0 \u00a0l = 1 m and a = 1 m2 Then \u00a0 \u00a0 \u00a0 \u00a0R = \u03c1 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 …. (ii) Thus, if we take 1 metre long piece of a substance having […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[404],"tags":[405,443,441,442],"yoast_head":"\nWhat Is Resistivity - A Plus Topper<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aplustopper.com\/resistivity\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is Resistivity\" \/>\n<meta property=\"og:description\" content=\"What Is Resistivity\u00a0 where \u03c1 (rho) is called resistivity of the material of conductor. If, \u00a0 \u00a0 \u00a0 \u00a0l = 1 m and a = 1 m2 Then \u00a0 \u00a0 \u00a0 \u00a0R = \u03c1 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 …. (ii) Thus, if we take 1 metre long piece of a substance having […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.aplustopper.com\/resistivity\/\" \/>\n<meta property=\"og:site_name\" content=\"A Plus Topper\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/aplustopper\/\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-16T04:30:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-12-17T04:17:31+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Veerendra\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.aplustopper.com\/#organization\",\"name\":\"Aplus Topper\",\"url\":\"https:\/\/www.aplustopper.com\/\",\"sameAs\":[\"https:\/\/www.facebook.com\/aplustopper\/\"],\"logo\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.aplustopper.com\/#logo\",\"inLanguage\":\"en-US\",\"url\":\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/12\/Aplus_380x90-logo.jpg\",\"contentUrl\":\"https:\/\/www.aplustopper.com\/wp-content\/uploads\/2018\/12\/Aplus_380x90-logo.jpg\",\"width\":1585,\"height\":375,\"caption\":\"Aplus Topper\"},\"image\":{\"@id\":\"https:\/\/www.aplustopper.com\/#logo\"}},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.aplustopper.com\/#website\",\"url\":\"https:\/\/www.aplustopper.com\/\",\"name\":\"A Plus Topper\",\"description\":\"Improve your Grades\",\"publisher\":{\"@id\":\"https:\/\/www.aplustopper.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.aplustopper.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.aplustopper.com\/resistivity\/#webpage\",\"url\":\"https:\/\/www.aplustopper.com\/resistivity\/\",\"name\":\"What Is Resistivity - A Plus Topper\",\"isPartOf\":{\"@id\":\"https:\/\/www.aplustopper.com\/#website\"},\"datePublished\":\"2022-12-16T04:30:36+00:00\",\"dateModified\":\"2022-12-17T04:17:31+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.aplustopper.com\/resistivity\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.aplustopper.com\/resistivity\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.aplustopper.com\/resistivity\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.aplustopper.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What Is Resistivity\"}]},{\"@type\":\"Article\",\"@id\":\"https:\/\/www.aplustopper.com\/resistivity\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.aplustopper.com\/resistivity\/#webpage\"},\"author\":{\"@id\":\"https:\/\/www.aplustopper.com\/#\/schema\/person\/1363657f2432a17193a1f5d6404b8a0e\"},\"headline\":\"What Is Resistivity\",\"datePublished\":\"2022-12-16T04:30:36+00:00\",\"dateModified\":\"2022-12-17T04:17:31+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.aplustopper.com\/resistivity\/#webpage\"},\"wordCount\":293,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.aplustopper.com\/#organization\"},\"keywords\":[\"Electricity\",\"Material on Basis of Resistivity\",\"Resistivity\",\"Units of resistivity\"],\"articleSection\":[\"Physics\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.aplustopper.com\/resistivity\/#respond\"]}]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.aplustopper.com\/#\/schema\/person\/1363657f2432a17193a1f5d6404b8a0e\",\"name\":\"Veerendra\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/www.aplustopper.com\/#personlogo\",\"inLanguage\":\"en-US\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/93ba5dedf76e89af65ae2e1d6ac09855?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/93ba5dedf76e89af65ae2e1d6ac09855?s=96&d=mm&r=g\",\"caption\":\"Veerendra\"},\"url\":\"https:\/\/www.aplustopper.com\/author\/veerendra\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"What Is Resistivity - A Plus Topper","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:\/\/www.aplustopper.com\/resistivity\/","og_locale":"en_US","og_type":"article","og_title":"What Is Resistivity","og_description":"What Is Resistivity\u00a0 where \u03c1 (rho) is called resistivity of the material of conductor. If, \u00a0 \u00a0 \u00a0 \u00a0l = 1 m and a = 1 m2 Then \u00a0 \u00a0 \u00a0 \u00a0R = \u03c1 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 …. 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