{"id":90873,"date":"2025-06-01T10:39:21","date_gmt":"2025-06-01T10:39:21","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90873"},"modified":"2025-06-01T10:39:21","modified_gmt":"2025-06-01T10:39:21","slug":"in-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/in-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop\/","title":{"rendered":"In experiment #1, a bar magnet is moved towards a conducting wire loop"},"content":{"rendered":"

In experiment #1, a bar magnet is moved towards a conducting wire loop axially, with the magnet’s north pole facing the loop. In experiment #2, the same process as in experiment #1 is repeated except that the south pole of the magnet faces the loop. Which one of the following statements is true in this context?<\/p>\n

[amp_mcq option1=”The direction of current in the loop will be of opposite nature in both the experiments.” option2=”The direction of current in the loop will be the same in both the experiments.” option3=”No current will flow in either of the two experiments.” option4=”More current will flow in the loop in experiment #1.” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2023<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe direction of current in the loop will be of opposite nature in both the experiments.
\n<\/section>\n
\nThis question is based on Faraday’s Law of electromagnetic induction and Lenz’s Law. Faraday’s Law states that a changing magnetic flux through a loop induces an electromotive force (EMF), which drives a current in a conducting loop. Lenz’s Law provides the direction of the induced current: it flows in such a direction as to oppose the change in magnetic flux that produced it.
\nIn experiment #1, the North pole of the bar magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet’s approaching field lines (which emerge from the North pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet. By the right-hand rule, this corresponds to a specific direction of current flow (e.g., counter-clockwise when viewed from the magnet).
\nIn experiment #2, the South pole of the same magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet’s approaching field lines (which enter the South pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet’s approaching South pole (i.e., in the direction of the field lines leaving a South pole). By the right-hand rule, this corresponds to the opposite direction of current flow compared to experiment #1 (e.g., clockwise when viewed from the magnet). Therefore, the direction of the induced current will be opposite in the two experiments.
\n<\/section>\n
\nLenz’s law is a consequence of the conservation of energy. If the induced current’s magnetic field reinforced the change in flux, the process would accelerate, producing energy indefinitely, which violates the law of conservation of energy. The strength of the induced current depends on the speed of the magnet and the strength of its magnetic field.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

In experiment #1, a bar magnet is moved towards a conducting wire loop axially, with the magnet’s north pole facing the loop. In experiment #2, the same process as in experiment #1 is repeated except that the south pole of the magnet faces the loop. Which one of the following statements is true in this … <\/p>\n

Detailed SolutionIn experiment #1, a bar magnet is moved towards a conducting wire loop<\/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":[1105,1201,1128],"class_list":["post-90873","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1105","tag-electric-current","tag-physics","no-featured-image-padding"],"yoast_head":"\nIn experiment #1, a bar magnet is moved towards a conducting wire loop<\/title>\n<meta name=\"description\" content=\"The direction of current in the loop will be of opposite nature in both the experiments. This question is based on Faraday's Law of electromagnetic induction and Lenz's Law. Faraday's Law states that a changing magnetic flux through a loop induces an electromotive force (EMF), which drives a current in a conducting loop. Lenz's Law provides the direction of the induced current: it flows in such a direction as to oppose the change in magnetic flux that produced it. In experiment #1, the North pole of the bar magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet's approaching field lines (which emerge from the North pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet. By the right-hand rule, this corresponds to a specific direction of current flow (e.g., counter-clockwise when viewed from the magnet). In experiment #2, the South pole of the same magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet's approaching field lines (which enter the South pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet's approaching South pole (i.e., in the direction of the field lines leaving a South pole). By the right-hand rule, this corresponds to the opposite direction of current flow compared to experiment #1 (e.g., clockwise when viewed from the magnet). Therefore, the direction of the induced current will be opposite in the two experiments.\" \/>\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-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"In experiment #1, a bar magnet is moved towards a conducting wire loop\" \/>\n<meta property=\"og:description\" content=\"The direction of current in the loop will be of opposite nature in both the experiments. This question is based on Faraday's Law of electromagnetic induction and Lenz's Law. Faraday's Law states that a changing magnetic flux through a loop induces an electromotive force (EMF), which drives a current in a conducting loop. Lenz's Law provides the direction of the induced current: it flows in such a direction as to oppose the change in magnetic flux that produced it. In experiment #1, the North pole of the bar magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet's approaching field lines (which emerge from the North pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet. By the right-hand rule, this corresponds to a specific direction of current flow (e.g., counter-clockwise when viewed from the magnet). In experiment #2, the South pole of the same magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet's approaching field lines (which enter the South pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet's approaching South pole (i.e., in the direction of the field lines leaving a South pole). By the right-hand rule, this corresponds to the opposite direction of current flow compared to experiment #1 (e.g., clockwise when viewed from the magnet). Therefore, the direction of the induced current will be opposite in the two experiments.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/in-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:39:21+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 experiment #1, a bar magnet is moved towards a conducting wire loop","description":"The direction of current in the loop will be of opposite nature in both the experiments. This question is based on Faraday's Law of electromagnetic induction and Lenz's Law. Faraday's Law states that a changing magnetic flux through a loop induces an electromotive force (EMF), which drives a current in a conducting loop. Lenz's Law provides the direction of the induced current: it flows in such a direction as to oppose the change in magnetic flux that produced it. In experiment #1, the North pole of the bar magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet's approaching field lines (which emerge from the North pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet. By the right-hand rule, this corresponds to a specific direction of current flow (e.g., counter-clockwise when viewed from the magnet). In experiment #2, the South pole of the same magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet's approaching field lines (which enter the South pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet's approaching South pole (i.e., in the direction of the field lines leaving a South pole). By the right-hand rule, this corresponds to the opposite direction of current flow compared to experiment #1 (e.g., clockwise when viewed from the magnet). Therefore, the direction of the induced current will be opposite in the two experiments.","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-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop\/","og_locale":"en_US","og_type":"article","og_title":"In experiment #1, a bar magnet is moved towards a conducting wire loop","og_description":"The direction of current in the loop will be of opposite nature in both the experiments. This question is based on Faraday's Law of electromagnetic induction and Lenz's Law. Faraday's Law states that a changing magnetic flux through a loop induces an electromotive force (EMF), which drives a current in a conducting loop. Lenz's Law provides the direction of the induced current: it flows in such a direction as to oppose the change in magnetic flux that produced it. In experiment #1, the North pole of the bar magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet's approaching field lines (which emerge from the North pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet. By the right-hand rule, this corresponds to a specific direction of current flow (e.g., counter-clockwise when viewed from the magnet). In experiment #2, the South pole of the same magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet's approaching field lines (which enter the South pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet's approaching South pole (i.e., in the direction of the field lines leaving a South pole). By the right-hand rule, this corresponds to the opposite direction of current flow compared to experiment #1 (e.g., clockwise when viewed from the magnet). Therefore, the direction of the induced current will be opposite in the two experiments.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/in-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:39:21+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-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop\/","url":"https:\/\/exam.pscnotes.com\/mcq\/in-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop\/","name":"In experiment #1, a bar magnet is moved towards a conducting wire loop","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:39:21+00:00","dateModified":"2025-06-01T10:39:21+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The direction of current in the loop will be of opposite nature in both the experiments. This question is based on Faraday's Law of electromagnetic induction and Lenz's Law. Faraday's Law states that a changing magnetic flux through a loop induces an electromotive force (EMF), which drives a current in a conducting loop. Lenz's Law provides the direction of the induced current: it flows in such a direction as to oppose the change in magnetic flux that produced it. In experiment #1, the North pole of the bar magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet's approaching field lines (which emerge from the North pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet. By the right-hand rule, this corresponds to a specific direction of current flow (e.g., counter-clockwise when viewed from the magnet). In experiment #2, the South pole of the same magnet is moved towards the loop. This increases the magnetic flux through the loop in the direction of the magnet's approaching field lines (which enter the South pole). To oppose this increase, the induced current in the loop creates a magnetic field pointing away from the magnet's approaching South pole (i.e., in the direction of the field lines leaving a South pole). By the right-hand rule, this corresponds to the opposite direction of current flow compared to experiment #1 (e.g., clockwise when viewed from the magnet). Therefore, the direction of the induced current will be opposite in the two experiments.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/in-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/in-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/in-experiment-1-a-bar-magnet-is-moved-towards-a-conducting-wire-loop\/#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":"In experiment #1, a bar magnet is moved towards a conducting wire loop"}]},{"@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\/90873","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=90873"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/90873\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=90873"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=90873"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=90873"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}