{"id":31225,"date":"2024-03-01T11:55:42","date_gmt":"2024-03-01T11:55:42","guid":{"rendered":"https:\/\/edukemy.com\/blog\/?p=31225"},"modified":"2024-03-01T11:55:44","modified_gmt":"2024-03-01T11:55:44","slug":"upsc-prelims-2020-question-99","status":"publish","type":"post","link":"https:\/\/edukemy.com\/blog\/upsc-prelims-2020-question-99\/","title":{"rendered":"UPSC Prelims 2020 &#8211; Question 99"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/edukemy.com\/upsc\/upsc-prelims-test-series?utm_source=Blog&amp;utm_medium=Blog&amp;utm_campaign=Blog-%20PTS\" target=\"_blank\" rel=\"noreferrer noopener\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/02\/Prelims-Test-Series-eng-and-hindi-1280\u00d7330.svg\" alt=\"UPSC Prelims Mock Test - ECONOMY 2\" class=\"wp-image-24924\" width=\"779\" height=\"199\"\/><\/a><\/figure>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<label for=\"ez-toc-cssicon-toggle-item-6a5d8ff839c98\" class=\"ez-toc-cssicon-toggle-label\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a5d8ff839c98\"  \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/edukemy.com\/blog\/upsc-prelims-2020-question-99\/#Q99_Consider_the_following_statements\" >Q99. Consider the following statements:<\/a><\/li><\/ul><\/nav><\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Q99_Consider_the_following_statements\"><\/span>Q99. Consider the following statements:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ol class=\"wp-block-list\"><li>Jet streams occur in the Northern Hemisphere only.<\/li><li>Only some cyclones develop an eye.<\/li><li>The temperature inside the eye of a cyclone is nearly 10\u00b0C lesser than that<br>of the surroundings.<\/li><\/ol>\n\n\n\n<p>Which of the statements given above is\/are correct?<br>(a) 1 only<br>(b) 2 and 3 only<br>(c) 2 only<br>(d) 1 and 3 only<\/p>\n\n\n\n<p>Answer: C<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Statement 1 is not correct: Jet Stream is a geostrophic wind blowing horizontally through the upper layers of the troposphere, generally from west to east, at an altitude of 20,000 &#8211; 50,000 feet. Jet Streams develop where air masses of different temperatures meet. So, usually, surface temperatures determine where the Jet Stream will form. The greater the difference in temperature, the faster the wind velocity inside the jet stream. Jet Streams extend from 20\u00b0 latitude to the poles in both hemispheres.<\/li><li>Statement 2 is correct: The hurricane&#8217;s center is a relatively calm and clear area of sinking air and light that usually do not exceed 15 mph (24 km\/h) and is typically 20- 40 miles (32-64 km) across. An eye will usually, develop when the maximum sustained wind speeds go above 74 mph (119 km\/h) and is the calmest part of the storm<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/edukemy.com\/free-resources-for-upsc?utm_source=Blog&amp;utm_medium=Banner&amp;utm_campaign=Resources\" target=\"_blank\" rel=\"noreferrer noopener\"><img decoding=\"async\" width=\"1280\" height=\"300\" data-src=\"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/06\/18.png\" alt=\"\" class=\"wp-image-42398 lazyload\" data-srcset=\"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/06\/18.png 1280w, https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/06\/18-1170x274.png 1170w, https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/06\/18-585x137.png 585w\" data-sizes=\"(max-width: 1280px) 100vw, 1280px\" src=\"data:image\/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==\" style=\"--smush-placeholder-width: 1280px; --smush-placeholder-aspect-ratio: 1280\/300;\" \/><\/a><\/figure>\n\n\n\n<p>For UPSC Prelims Resources,&nbsp;<a href=\"https:\/\/edukemy.com\/upsc-cse-prelims-resource-centre\" target=\"_blank\" rel=\"noreferrer noopener\">Click here<\/a><\/p>\n\n\n\n<p>For Daily Updates and Study Material:<\/p>\n\n\n\n<p>Join our Telegram Channel \u2013&nbsp;<a href=\"https:\/\/t.me\/WithEdukemy4IAS\" target=\"_blank\" rel=\"noreferrer noopener\">Edukemy for IAS<\/a><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>1. 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Consider the following statements:<\/p>\n<p>Jet streams occur in the Northern Hemisphere only.<\/p>\n<p>Only some cyclones develop an eye.<\/p>\n","protected":false},"author":17,"featured_media":31226,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"_lmt_disableupdate":"","_lmt_disable":"","footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[1644],"tags":[232,515,231],"class_list":["post-31225","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-upsc-prelims","tag-upsc","tag-upsc-cse","tag-upsc-prelims"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.9 - aioseo.com -->\n\t<meta name=\"description\" content=\"Q99. 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Consider the following statements: Jet streams occur in the Northern Hemisphere only. Only some cyclones develop an eye.","og:url":"https:\/\/edukemy.com\/blog\/upsc-prelims-2020-question-99\/","og:image":"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/12\/edukemy-logo-horizontal.jpg","og:image:secure_url":"https:\/\/edukemy.com\/blog\/wp-content\/uploads\/2024\/12\/edukemy-logo-horizontal.jpg","og:image:width":512,"og:image:height":157,"article:published_time":"2024-03-01T11:55:42+00:00","article:modified_time":"2024-03-01T11:55:44+00:00","article:publisher":"https:\/\/www.facebook.com\/edukemy\/","twitter:card":"summary_large_image","twitter:site":"@EdukemyOfficial","twitter:title":"UPSC Prelims 2020 \u2013 Question 99 - Blog","twitter:description":"Q99. Consider the following statements: Jet streams occur in the Northern Hemisphere only. 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Only some cyclones develop an eye.","keywords":[],"keyphrases":{"focus":{"keyphrase":"UPSC Prelims 2020","score":51,"analysis":{"keyphraseInTitle":{"score":9,"maxScore":9,"error":0},"keyphraseInDescription":{"score":3,"maxScore":9,"error":1},"keyphraseLength":{"score":9,"maxScore":9,"error":0,"length":3},"keyphraseInURL":{"score":5,"maxScore":5,"error":0},"keyphraseInIntroduction":{"score":3,"maxScore":9,"error":1},"keyphraseInSubHeadings":{"score":3,"maxScore":9,"error":1},"keyphraseInImageAlt":{"score":3,"maxScore":9,"error":1},"keywordDensity":{"score":0,"type":"low","maxScore":9,"error":1}}},"additional":[]},"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":"","og_custom_url":null,"og_article_section":null,"og_article_tags":[],"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"BlogPosting","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":"-1","robots_max_videopreview":"-1","robots_max_imagepreview":"large","priority":null,"frequency":"default","local_seo":null,"limit_modified_date":false,"created":"2024-03-01 11:55:36","updated":"2026-07-06 17:32:23","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/edukemy.com\/blog\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/edukemy.com\/blog\/category\/upsc-prelims\/\" title=\"UPSC Prelims\">UPSC Prelims<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tUPSC Prelims 2020 \u2013 Question 99\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/edukemy.com\/blog"},{"label":"UPSC Prelims","link":"https:\/\/edukemy.com\/blog\/category\/upsc-prelims\/"},{"label":"UPSC Prelims 2020 &#8211; Question 99","link":"https:\/\/edukemy.com\/blog\/upsc-prelims-2020-question-99\/"}],"_links":{"self":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts\/31225","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/comments?post=31225"}],"version-history":[{"count":1,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts\/31225\/revisions"}],"predecessor-version":[{"id":31227,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/posts\/31225\/revisions\/31227"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/media\/31226"}],"wp:attachment":[{"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/media?parent=31225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/categories?post=31225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/edukemy.com\/blog\/wp-json\/wp\/v2\/tags?post=31225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}