{"id":87887,"date":"2025-06-01T06:56:20","date_gmt":"2025-06-01T06:56:20","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87887"},"modified":"2025-06-01T06:56:20","modified_gmt":"2025-06-01T06:56:20","slug":"in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/","title":{"rendered":"In a group discussion on shape and size of the Earth, three students s"},"content":{"rendered":"<p>In a group discussion on shape and size of the Earth, three students stated the following points :<\/p>\n<ul>\n<li>1. Student 1 : The shape of the Earth is basically an oblate spheroid.<\/li>\n<li>2. Student 2 : The polar diameter of the Earth is more than the equatorial diameter.<\/li>\n<li>3. Student 3 : Bulge along the equatorial region is due to revolution of the Earth.<\/li>\n<\/ul>\n<p>Who among the above students is\/are correct?<\/p>\n<p>[amp_mcq option1=&#8221;Student 1 only&#8221; option2=&#8221;Student 1 and Student 2 only&#8221; option3=&#8221;Student 2 and Student 3 only&#8221; option4=&#8221;Student 1, Student 2 and Student 3&#8243; correct=&#8221;option1&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC NDA-1 &#8211; 2022<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-nda-1-2022.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-nda-1-2022\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nThe correct answer is A) Student 1 only.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nStudent 1: &#8220;The shape of the Earth is basically an oblate spheroid.&#8221; This is correct. The Earth is not a perfect sphere; it is slightly flattened at the poles and bulges at the equator. An oblate spheroid is a geometric shape that accurately represents this form.<br \/>\nStudent 2: &#8220;The polar diameter of the Earth is more than the equatorial diameter.&#8221; This is incorrect. The equatorial diameter (approx. 12,756 km) is greater than the polar diameter (approx. 12,714 km) by about 42 km, due to the equatorial bulge.<br \/>\nStudent 3: &#8220;Bulge along the equatorial region is due to revolution of the Earth.&#8221; This is incorrect. The equatorial bulge is primarily caused by the Earth&#8217;s *rotation* on its axis. The centrifugal force generated by rotation is strongest at the equator, leading to the outward bulge. Revolution refers to the Earth&#8217;s orbit around the Sun.<br \/>\nTherefore, only Student 1&#8217;s statement is correct.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nThe Earth&#8217;s actual shape is even more irregular than an oblate spheroid due to variations in gravity and topography; this complex shape is called a geoid. However, for general purposes, an oblate spheroid is a good approximation. The difference between the equatorial and polar diameters is a consequence of the Earth&#8217;s formation and ongoing rotation.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>In a group discussion on shape and size of the Earth, three students stated the following points : 1. Student 1 : The shape of the Earth is basically an oblate spheroid. 2. Student 2 : The polar diameter of the Earth is more than the equatorial diameter. 3. Student 3 : Bulge along the &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"In a group discussion on shape and size of the Earth, three students s\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/#more-87887\">Detailed Solution<span class=\"screen-reader-text\">In a group discussion on shape and size of the Earth, three students s<\/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":[1093],"tags":[1108,1150,1106],"class_list":["post-87887","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1108","tag-the-earth","tag-world-and-physical-geography","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>In a group discussion on shape and size of the Earth, three students s<\/title>\n<meta name=\"description\" content=\"The correct answer is A) Student 1 only. Student 1: &quot;The shape of the Earth is basically an oblate spheroid.&quot; This is correct. The Earth is not a perfect sphere; it is slightly flattened at the poles and bulges at the equator. An oblate spheroid is a geometric shape that accurately represents this form. Student 2: &quot;The polar diameter of the Earth is more than the equatorial diameter.&quot; This is incorrect. The equatorial diameter (approx. 12,756 km) is greater than the polar diameter (approx. 12,714 km) by about 42 km, due to the equatorial bulge. Student 3: &quot;Bulge along the equatorial region is due to revolution of the Earth.&quot; This is incorrect. The equatorial bulge is primarily caused by the Earth&#039;s *rotation* on its axis. The centrifugal force generated by rotation is strongest at the equator, leading to the outward bulge. Revolution refers to the Earth&#039;s orbit around the Sun. Therefore, only Student 1&#039;s statement is correct.\" \/>\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\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"In a group discussion on shape and size of the Earth, three students s\" \/>\n<meta property=\"og:description\" content=\"The correct answer is A) Student 1 only. Student 1: &quot;The shape of the Earth is basically an oblate spheroid.&quot; This is correct. The Earth is not a perfect sphere; it is slightly flattened at the poles and bulges at the equator. An oblate spheroid is a geometric shape that accurately represents this form. Student 2: &quot;The polar diameter of the Earth is more than the equatorial diameter.&quot; This is incorrect. The equatorial diameter (approx. 12,756 km) is greater than the polar diameter (approx. 12,714 km) by about 42 km, due to the equatorial bulge. Student 3: &quot;Bulge along the equatorial region is due to revolution of the Earth.&quot; This is incorrect. The equatorial bulge is primarily caused by the Earth&#039;s *rotation* on its axis. The centrifugal force generated by rotation is strongest at the equator, leading to the outward bulge. Revolution refers to the Earth&#039;s orbit around the Sun. Therefore, only Student 1&#039;s statement is correct.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:56:20+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=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"In a group discussion on shape and size of the Earth, three students s","description":"The correct answer is A) Student 1 only. Student 1: \"The shape of the Earth is basically an oblate spheroid.\" This is correct. The Earth is not a perfect sphere; it is slightly flattened at the poles and bulges at the equator. An oblate spheroid is a geometric shape that accurately represents this form. Student 2: \"The polar diameter of the Earth is more than the equatorial diameter.\" This is incorrect. The equatorial diameter (approx. 12,756 km) is greater than the polar diameter (approx. 12,714 km) by about 42 km, due to the equatorial bulge. Student 3: \"Bulge along the equatorial region is due to revolution of the Earth.\" This is incorrect. The equatorial bulge is primarily caused by the Earth's *rotation* on its axis. The centrifugal force generated by rotation is strongest at the equator, leading to the outward bulge. Revolution refers to the Earth's orbit around the Sun. Therefore, only Student 1's statement is correct.","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\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/","og_locale":"en_US","og_type":"article","og_title":"In a group discussion on shape and size of the Earth, three students s","og_description":"The correct answer is A) Student 1 only. Student 1: \"The shape of the Earth is basically an oblate spheroid.\" This is correct. The Earth is not a perfect sphere; it is slightly flattened at the poles and bulges at the equator. An oblate spheroid is a geometric shape that accurately represents this form. Student 2: \"The polar diameter of the Earth is more than the equatorial diameter.\" This is incorrect. The equatorial diameter (approx. 12,756 km) is greater than the polar diameter (approx. 12,714 km) by about 42 km, due to the equatorial bulge. Student 3: \"Bulge along the equatorial region is due to revolution of the Earth.\" This is incorrect. The equatorial bulge is primarily caused by the Earth's *rotation* on its axis. The centrifugal force generated by rotation is strongest at the equator, leading to the outward bulge. Revolution refers to the Earth's orbit around the Sun. Therefore, only Student 1's statement is correct.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:56:20+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/","url":"https:\/\/exam.pscnotes.com\/mcq\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/","name":"In a group discussion on shape and size of the Earth, three students s","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:56:20+00:00","dateModified":"2025-06-01T06:56:20+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is A) Student 1 only. Student 1: \"The shape of the Earth is basically an oblate spheroid.\" This is correct. The Earth is not a perfect sphere; it is slightly flattened at the poles and bulges at the equator. An oblate spheroid is a geometric shape that accurately represents this form. Student 2: \"The polar diameter of the Earth is more than the equatorial diameter.\" This is incorrect. The equatorial diameter (approx. 12,756 km) is greater than the polar diameter (approx. 12,714 km) by about 42 km, due to the equatorial bulge. Student 3: \"Bulge along the equatorial region is due to revolution of the Earth.\" This is incorrect. The equatorial bulge is primarily caused by the Earth's *rotation* on its axis. The centrifugal force generated by rotation is strongest at the equator, leading to the outward bulge. Revolution refers to the Earth's orbit around the Sun. Therefore, only Student 1's statement is correct.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/in-a-group-discussion-on-shape-and-size-of-the-earth-three-students-s\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-1","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-1\/"},{"@type":"ListItem","position":3,"name":"In a group discussion on shape and size of the Earth, three students s"}]},{"@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\/87887","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=87887"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/87887\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=87887"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=87887"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=87887"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}