{"id":90006,"date":"2025-06-01T10:18:59","date_gmt":"2025-06-01T10:18:59","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90006"},"modified":"2025-06-01T10:18:59","modified_gmt":"2025-06-01T10:18:59","slug":"which-one-of-the-following-statements-is-not-correct-48","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-48\/","title":{"rendered":"Which one of the following statements is not correct?"},"content":{"rendered":"

Which one of the following statements is not correct?<\/p>\n

[amp_mcq option1=”The earth\u2019s magnetic field is due to the motion of metals like iron and nickel in the core of the earth” option2=”The magnetic field lines of force are widely separated near the poles of a magnet but these lines come closer to one another at other places” option3=”If the cross-sectional area of a magnetic field increases, but the flux remains the same, the flux density decreases” option4=”When the speed of a conductor moving through a magnetic field is increased, the induced voltage increases” correct=”option2″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC CAPF – 2016<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nStatement B is incorrect. Magnetic field lines are a visual representation of the magnetic field’s strength and direction. Where the lines are closer together, the magnetic field is stronger; where they are farther apart, the field is weaker. The magnetic field of a bar magnet is strongest at the poles. Therefore, the magnetic field lines of force are most concentrated and come closer to one another near the poles of a magnet, not widely separated. They are more widely separated away from the poles.
\n<\/section>\n
\nUnderstanding the properties and representation of magnetic field lines is fundamental in magnetism.
\n<\/section>\n
\nStatement A is correct: The Earth’s magnetic field is believed to be generated by the motion of molten metallic materials (primarily iron and nickel) in the Earth’s outer core, a process called the geodynamo.
\nStatement C is correct: Magnetic flux density (B) is defined as the magnetic flux (\u03a6) passing through a unit area (A) perpendicular to the direction of the flux (B = \u03a6\/A). If the flux remains constant but the area increases, the flux density decreases.
\nStatement D is correct: According to Faraday’s law of electromagnetic induction, the magnitude of the induced voltage (EMF) in a conductor moving through a magnetic field is proportional to the speed at which the conductor cuts the magnetic field lines. Thus, if the speed of the conductor is increased, the induced voltage increases.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements is not correct? [amp_mcq option1=”The earth\u2019s magnetic field is due to the motion of metals like iron and nickel in the core of the earth” option2=”The magnetic field lines of force are widely separated near the poles of a magnet but these lines come closer to one another at … <\/p>\n

Detailed SolutionWhich one of the following statements is not correct?<\/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":[1085],"tags":[1098,1115,1128],"class_list":["post-90006","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1098","tag-miscellaneous","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements is not correct?<\/title>\n<meta name=\"description\" content=\"Statement B is incorrect. Magnetic field lines are a visual representation of the magnetic field's strength and direction. Where the lines are closer together, the magnetic field is stronger; where they are farther apart, the field is weaker. The magnetic field of a bar magnet is strongest at the poles. Therefore, the magnetic field lines of force are most concentrated and come closer to one another near the poles of a magnet, not widely separated. They are more widely separated away from the poles. Understanding the properties and representation of magnetic field lines is fundamental in magnetism.\" \/>\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\/which-one-of-the-following-statements-is-not-correct-48\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following statements is not correct?\" \/>\n<meta property=\"og:description\" content=\"Statement B is incorrect. Magnetic field lines are a visual representation of the magnetic field's strength and direction. Where the lines are closer together, the magnetic field is stronger; where they are farther apart, the field is weaker. The magnetic field of a bar magnet is strongest at the poles. Therefore, the magnetic field lines of force are most concentrated and come closer to one another near the poles of a magnet, not widely separated. They are more widely separated away from the poles. Understanding the properties and representation of magnetic field lines is fundamental in magnetism.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-48\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:18:59+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":"Which one of the following statements is not correct?","description":"Statement B is incorrect. Magnetic field lines are a visual representation of the magnetic field's strength and direction. Where the lines are closer together, the magnetic field is stronger; where they are farther apart, the field is weaker. The magnetic field of a bar magnet is strongest at the poles. Therefore, the magnetic field lines of force are most concentrated and come closer to one another near the poles of a magnet, not widely separated. They are more widely separated away from the poles. Understanding the properties and representation of magnetic field lines is fundamental in magnetism.","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\/which-one-of-the-following-statements-is-not-correct-48\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements is not correct?","og_description":"Statement B is incorrect. Magnetic field lines are a visual representation of the magnetic field's strength and direction. Where the lines are closer together, the magnetic field is stronger; where they are farther apart, the field is weaker. The magnetic field of a bar magnet is strongest at the poles. Therefore, the magnetic field lines of force are most concentrated and come closer to one another near the poles of a magnet, not widely separated. They are more widely separated away from the poles. Understanding the properties and representation of magnetic field lines is fundamental in magnetism.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-48\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:18:59+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\/which-one-of-the-following-statements-is-not-correct-48\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-48\/","name":"Which one of the following statements is not correct?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:18:59+00:00","dateModified":"2025-06-01T10:18:59+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Statement B is incorrect. Magnetic field lines are a visual representation of the magnetic field's strength and direction. Where the lines are closer together, the magnetic field is stronger; where they are farther apart, the field is weaker. The magnetic field of a bar magnet is strongest at the poles. Therefore, the magnetic field lines of force are most concentrated and come closer to one another near the poles of a magnet, not widely separated. They are more widely separated away from the poles. Understanding the properties and representation of magnetic field lines is fundamental in magnetism.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-48\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-48\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-48\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CAPF","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-capf\/"},{"@type":"ListItem","position":3,"name":"Which one of the following statements is not correct?"}]},{"@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\/90006","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=90006"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/90006\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=90006"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=90006"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=90006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}