{"id":87676,"date":"2025-06-01T06:51:04","date_gmt":"2025-06-01T06:51:04","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87676"},"modified":"2025-06-01T06:51:04","modified_gmt":"2025-06-01T06:51:04","slug":"consider-the-following-statements-about-a-solenoid-1-the-magnetic","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-solenoid-1-the-magnetic\/","title":{"rendered":"Consider the following statements about a solenoid:\n  1. The magnetic"},"content":{"rendered":"<p>Consider the following statements about a solenoid:<\/p>\n<ul>\n<li>1. The magnetic field strength in a solenoid depends upon the number of turns per unit length in the solenoid<\/li>\n<li>2. The magnetic field strength in a solenoid depends upon the current flowing in the wire of the solenoid<\/li>\n<li>3. The magnetic field strength in a solenoid depends upon the diameter of the solenoid<\/li>\n<\/ul>\n<p>Which of the statements given above are correct ?<\/p>\n<p>[amp_mcq option1=&#8221;1, 2 and 3&#8243; option2=&#8221;1 and 3 only&#8221; option3=&#8221;2 and 3 only&#8221; option4=&#8221;1 and 2 only&#8221; correct=&#8221;option4&#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; 2019<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-nda-1-2019.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-nda-1-2019\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nStatements 1 and 2 are correct.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nThe magnetic field strength inside a long solenoid is given by the formula B \u2248 \u03bc\u2080 * n * I, where \u03bc\u2080 is the permeability of free space, n is the number of turns per unit length (n = N\/L), and I is the current flowing through the solenoid.<br \/>\nStatement 1 is correct as B is directly proportional to n (number of turns per unit length).<br \/>\nStatement 2 is correct as B is directly proportional to I (current).<br \/>\nStatement 3 is incorrect. For an ideal long solenoid, the magnetic field strength inside the solenoid (away from the ends) does not depend on its diameter. While the diameter might have minor effects in non-ideal cases (finite length solenoid, field near ends), the standard formula and theoretical treatment indicate no dependence on diameter for the uniform field inside a long solenoid.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nThe formula B = \u03bc\u2080nI is an approximation that holds well for solenoids whose length is much greater than their diameter. In such cases, the magnetic field is strong, uniform inside (except near the ends), and zero outside.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Consider the following statements about a solenoid: 1. The magnetic field strength in a solenoid depends upon the number of turns per unit length in the solenoid 2. The magnetic field strength in a solenoid depends upon the current flowing in the wire of the solenoid 3. The magnetic field strength in a solenoid depends &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Consider the following statements about a solenoid:\n  1. The magnetic\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-solenoid-1-the-magnetic\/#more-87676\">Detailed Solution<span class=\"screen-reader-text\">Consider the following statements about a solenoid:<br \/>\n  1. The magnetic<\/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":[1119,1201,1128],"class_list":["post-87676","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1119","tag-electric-current","tag-physics","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 about a solenoid:  1. The magnetic<\/title>\n<meta name=\"description\" content=\"Statements 1 and 2 are correct. The magnetic field strength inside a long solenoid is given by the formula B \u2248 \u03bc\u2080 * n * I, where \u03bc\u2080 is the permeability of free space, n is the number of turns per unit length (n = N\/L), and I is the current flowing through the solenoid. Statement 1 is correct as B is directly proportional to n (number of turns per unit length). Statement 2 is correct as B is directly proportional to I (current). Statement 3 is incorrect. For an ideal long solenoid, the magnetic field strength inside the solenoid (away from the ends) does not depend on its diameter. While the diameter might have minor effects in non-ideal cases (finite length solenoid, field near ends), the standard formula and theoretical treatment indicate no dependence on diameter for the uniform field inside a long solenoid.\" \/>\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-about-a-solenoid-1-the-magnetic\/\" \/>\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 about a solenoid:  1. The magnetic\" \/>\n<meta property=\"og:description\" content=\"Statements 1 and 2 are correct. The magnetic field strength inside a long solenoid is given by the formula B \u2248 \u03bc\u2080 * n * I, where \u03bc\u2080 is the permeability of free space, n is the number of turns per unit length (n = N\/L), and I is the current flowing through the solenoid. Statement 1 is correct as B is directly proportional to n (number of turns per unit length). Statement 2 is correct as B is directly proportional to I (current). Statement 3 is incorrect. For an ideal long solenoid, the magnetic field strength inside the solenoid (away from the ends) does not depend on its diameter. While the diameter might have minor effects in non-ideal cases (finite length solenoid, field near ends), the standard formula and theoretical treatment indicate no dependence on diameter for the uniform field inside a long solenoid.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-solenoid-1-the-magnetic\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:51:04+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 about a solenoid:  1. The magnetic","description":"Statements 1 and 2 are correct. The magnetic field strength inside a long solenoid is given by the formula B \u2248 \u03bc\u2080 * n * I, where \u03bc\u2080 is the permeability of free space, n is the number of turns per unit length (n = N\/L), and I is the current flowing through the solenoid. Statement 1 is correct as B is directly proportional to n (number of turns per unit length). Statement 2 is correct as B is directly proportional to I (current). Statement 3 is incorrect. For an ideal long solenoid, the magnetic field strength inside the solenoid (away from the ends) does not depend on its diameter. While the diameter might have minor effects in non-ideal cases (finite length solenoid, field near ends), the standard formula and theoretical treatment indicate no dependence on diameter for the uniform field inside a long solenoid.","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-about-a-solenoid-1-the-magnetic\/","og_locale":"en_US","og_type":"article","og_title":"Consider the following statements about a solenoid:  1. The magnetic","og_description":"Statements 1 and 2 are correct. The magnetic field strength inside a long solenoid is given by the formula B \u2248 \u03bc\u2080 * n * I, where \u03bc\u2080 is the permeability of free space, n is the number of turns per unit length (n = N\/L), and I is the current flowing through the solenoid. Statement 1 is correct as B is directly proportional to n (number of turns per unit length). Statement 2 is correct as B is directly proportional to I (current). Statement 3 is incorrect. For an ideal long solenoid, the magnetic field strength inside the solenoid (away from the ends) does not depend on its diameter. While the diameter might have minor effects in non-ideal cases (finite length solenoid, field near ends), the standard formula and theoretical treatment indicate no dependence on diameter for the uniform field inside a long solenoid.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-solenoid-1-the-magnetic\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:51:04+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-about-a-solenoid-1-the-magnetic\/","url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-solenoid-1-the-magnetic\/","name":"Consider the following statements about a solenoid: 1. The magnetic","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:51:04+00:00","dateModified":"2025-06-01T06:51:04+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Statements 1 and 2 are correct. The magnetic field strength inside a long solenoid is given by the formula B \u2248 \u03bc\u2080 * n * I, where \u03bc\u2080 is the permeability of free space, n is the number of turns per unit length (n = N\/L), and I is the current flowing through the solenoid. Statement 1 is correct as B is directly proportional to n (number of turns per unit length). Statement 2 is correct as B is directly proportional to I (current). Statement 3 is incorrect. For an ideal long solenoid, the magnetic field strength inside the solenoid (away from the ends) does not depend on its diameter. While the diameter might have minor effects in non-ideal cases (finite length solenoid, field near ends), the standard formula and theoretical treatment indicate no dependence on diameter for the uniform field inside a long solenoid.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-solenoid-1-the-magnetic\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-solenoid-1-the-magnetic\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-statements-about-a-solenoid-1-the-magnetic\/#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":"Consider the following statements about a solenoid: 1. 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