{"id":92091,"date":"2025-06-01T11:13:44","date_gmt":"2025-06-01T11:13:44","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=92091"},"modified":"2025-06-01T11:13:44","modified_gmt":"2025-06-01T11:13:44","slug":"consider-the-following-statements-1-in-a-seismograph-p-waves-are","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/","title":{"rendered":"Consider the following statements:\n \n 1. In a seismograph, P waves are"},"content":{"rendered":"<p>Consider the following statements:<\/p>\n<ul>\n<li>1. In a seismograph, P waves are recorded earlier than S waves.<\/li>\n<li>2. In P waves, the individual particles vibrate to and fro in the direction of wave propagation whereas in S waves, the particles vibrate up and down at right angles to the direction of wave propagation.<\/li>\n<\/ul>\n<p>Which of the statements given above is\/are correct?<\/p>\n<p>[amp_mcq option1=&#8221;1 only&#8221; option2=&#8221;2 only&#8221; option3=&#8221;Both 1 and 2&#8243; option4=&#8221;Neither 1 nor 2&#8243; correct=&#8221;option3&#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 IAS &#8211; 2023<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-ias-2023.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-ias-2023\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nThe correct answer is C) Both 1 and 2.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nStatement 1 is correct. P waves (Primary waves) are compressional waves that travel fastest through the Earth&#8217;s layers. S waves (Secondary waves) are shear waves and travel slower than P waves. Therefore, P waves arrive at a seismograph before S waves from the same earthquake event.<br \/>\nStatement 2 is correct. P waves are longitudinal waves, meaning the particles of the medium vibrate back and forth in the direction of wave propagation. S waves are transverse waves, meaning the particles vibrate perpendicular (at right angles) to the direction of wave propagation.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nP waves can travel through solids, liquids, and gases, while S waves can only travel through solids. This difference in behavior was crucial in understanding the Earth&#8217;s internal structure, particularly the liquid outer core which stops S waves.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Consider the following statements: 1. In a seismograph, P waves are recorded earlier than S waves. 2. In P waves, the individual particles vibrate to and fro in the direction of wave propagation whereas in S waves, the particles vibrate up and down at right angles to the direction of wave propagation. Which of the &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Consider the following statements:\n \n 1. In a seismograph, P waves are\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/#more-92091\">Detailed Solution<span class=\"screen-reader-text\">Consider the following statements:<\/p>\n<p> 1. In a seismograph, P waves are<\/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":[1092],"tags":[1105,1217,1106],"class_list":["post-92091","post","type-post","status-publish","format-standard","hentry","category-upsc-ias","tag-1105","tag-the-earthquake","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>Consider the following statements:  1. In a seismograph, P waves are<\/title>\n<meta name=\"description\" content=\"The correct answer is C) Both 1 and 2. Statement 1 is correct. P waves (Primary waves) are compressional waves that travel fastest through the Earth&#039;s layers. S waves (Secondary waves) are shear waves and travel slower than P waves. Therefore, P waves arrive at a seismograph before S waves from the same earthquake event. Statement 2 is correct. P waves are longitudinal waves, meaning the particles of the medium vibrate back and forth in the direction of wave propagation. S waves are transverse waves, meaning the particles vibrate perpendicular (at right angles) to the direction of wave propagation.\" \/>\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\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Consider the following statements:  1. In a seismograph, P waves are\" \/>\n<meta property=\"og:description\" content=\"The correct answer is C) Both 1 and 2. Statement 1 is correct. P waves (Primary waves) are compressional waves that travel fastest through the Earth&#039;s layers. S waves (Secondary waves) are shear waves and travel slower than P waves. Therefore, P waves arrive at a seismograph before S waves from the same earthquake event. Statement 2 is correct. P waves are longitudinal waves, meaning the particles of the medium vibrate back and forth in the direction of wave propagation. S waves are transverse waves, meaning the particles vibrate perpendicular (at right angles) to the direction of wave propagation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T11:13:44+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":"Consider the following statements:  1. In a seismograph, P waves are","description":"The correct answer is C) Both 1 and 2. Statement 1 is correct. P waves (Primary waves) are compressional waves that travel fastest through the Earth's layers. S waves (Secondary waves) are shear waves and travel slower than P waves. Therefore, P waves arrive at a seismograph before S waves from the same earthquake event. Statement 2 is correct. P waves are longitudinal waves, meaning the particles of the medium vibrate back and forth in the direction of wave propagation. S waves are transverse waves, meaning the particles vibrate perpendicular (at right angles) to the direction of wave propagation.","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\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/","og_locale":"en_US","og_type":"article","og_title":"Consider the following statements:  1. In a seismograph, P waves are","og_description":"The correct answer is C) Both 1 and 2. Statement 1 is correct. P waves (Primary waves) are compressional waves that travel fastest through the Earth's layers. S waves (Secondary waves) are shear waves and travel slower than P waves. Therefore, P waves arrive at a seismograph before S waves from the same earthquake event. Statement 2 is correct. P waves are longitudinal waves, meaning the particles of the medium vibrate back and forth in the direction of wave propagation. S waves are transverse waves, meaning the particles vibrate perpendicular (at right angles) to the direction of wave propagation.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T11:13:44+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\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/","url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/","name":"Consider the following statements: 1. In a seismograph, P waves are","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T11:13:44+00:00","dateModified":"2025-06-01T11:13:44+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is C) Both 1 and 2. Statement 1 is correct. P waves (Primary waves) are compressional waves that travel fastest through the Earth's layers. S waves (Secondary waves) are shear waves and travel slower than P waves. Therefore, P waves arrive at a seismograph before S waves from the same earthquake event. Statement 2 is correct. P waves are longitudinal waves, meaning the particles of the medium vibrate back and forth in the direction of wave propagation. S waves are transverse waves, meaning the particles vibrate perpendicular (at right angles) to the direction of wave propagation.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-1-in-a-seismograph-p-waves-are\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC IAS","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-ias\/"},{"@type":"ListItem","position":3,"name":"Consider the following statements: 1. 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