{"id":89090,"date":"2025-06-01T07:29:10","date_gmt":"2025-06-01T07:29:10","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89090"},"modified":"2025-06-01T07:29:10","modified_gmt":"2025-06-01T07:29:10","slug":"the-ac-mains-domestic-supply-current-in-india-changes-direction-in","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-ac-mains-domestic-supply-current-in-india-changes-direction-in\/","title":{"rendered":"The AC mains domestic supply current in India changes direction in"},"content":{"rendered":"

The AC mains domestic supply current in India changes direction in every<\/p>\n

[amp_mcq option1=”50 s” option2=”$\\frac{1}{50}$ s” option3=”100 s” option4=”$\\frac{1}{100}$ s” correct=”option4″]<\/p>\n

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\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2024<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe standard frequency of AC mains supply in India is 50 Hz. The frequency (f) is the number of complete cycles per second. The time period (T) of one complete cycle is given by T = 1\/f. For f = 50 Hz, T = 1\/50 s. In one complete cycle of alternating current, the current starts from zero, reaches a maximum in one direction, passes through zero, reaches a maximum in the opposite direction, and returns to zero. The current changes direction twice within one complete cycle (at the points where it crosses the zero line). Thus, the time taken for the current to change direction is half the time period. Time for direction change = T\/2 = (1\/50 s) \/ 2 = 1\/100 s.
\n<\/section>\n
\nThe frequency of AC supply is the number of cycles per second. The time period is the duration of one cycle (T = 1\/f). AC current changes direction twice in every complete cycle.
\n<\/section>\n
\nIn many other countries, such as the USA, the standard AC mains frequency is 60 Hz. In a 60 Hz system, the current changes direction every 1\/120 s.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The AC mains domestic supply current in India changes direction in every [amp_mcq option1=”50 s” option2=”$\\frac{1}{50}$ s” option3=”100 s” option4=”$\\frac{1}{100}$ s” correct=”option4″] This question was previously asked in UPSC NDA-2 – 2024 Download PDFAttempt Online The standard frequency of AC mains supply in India is 50 Hz. The frequency (f) is the number of complete … <\/p>\n

Detailed SolutionThe AC mains domestic supply current in India changes direction in<\/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":[1094],"tags":[1103,1201,1128],"class_list":["post-89090","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1103","tag-electric-current","tag-physics","no-featured-image-padding"],"yoast_head":"\nThe AC mains domestic supply current in India changes direction in<\/title>\n<meta name=\"description\" content=\"The standard frequency of AC mains supply in India is 50 Hz. The frequency (f) is the number of complete cycles per second. The time period (T) of one complete cycle is given by T = 1\/f. For f = 50 Hz, T = 1\/50 s. In one complete cycle of alternating current, the current starts from zero, reaches a maximum in one direction, passes through zero, reaches a maximum in the opposite direction, and returns to zero. The current changes direction twice within one complete cycle (at the points where it crosses the zero line). Thus, the time taken for the current to change direction is half the time period. Time for direction change = T\/2 = (1\/50 s) \/ 2 = 1\/100 s. The frequency of AC supply is the number of cycles per second. The time period is the duration of one cycle (T = 1\/f). AC current changes direction twice in every complete cycle.\" \/>\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\/the-ac-mains-domestic-supply-current-in-india-changes-direction-in\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The AC mains domestic supply current in India changes direction in\" \/>\n<meta property=\"og:description\" content=\"The standard frequency of AC mains supply in India is 50 Hz. The frequency (f) is the number of complete cycles per second. The time period (T) of one complete cycle is given by T = 1\/f. For f = 50 Hz, T = 1\/50 s. In one complete cycle of alternating current, the current starts from zero, reaches a maximum in one direction, passes through zero, reaches a maximum in the opposite direction, and returns to zero. The current changes direction twice within one complete cycle (at the points where it crosses the zero line). Thus, the time taken for the current to change direction is half the time period. Time for direction change = T\/2 = (1\/50 s) \/ 2 = 1\/100 s. The frequency of AC supply is the number of cycles per second. The time period is the duration of one cycle (T = 1\/f). AC current changes direction twice in every complete cycle.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-ac-mains-domestic-supply-current-in-india-changes-direction-in\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:29:10+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":"The AC mains domestic supply current in India changes direction in","description":"The standard frequency of AC mains supply in India is 50 Hz. The frequency (f) is the number of complete cycles per second. The time period (T) of one complete cycle is given by T = 1\/f. For f = 50 Hz, T = 1\/50 s. In one complete cycle of alternating current, the current starts from zero, reaches a maximum in one direction, passes through zero, reaches a maximum in the opposite direction, and returns to zero. The current changes direction twice within one complete cycle (at the points where it crosses the zero line). Thus, the time taken for the current to change direction is half the time period. Time for direction change = T\/2 = (1\/50 s) \/ 2 = 1\/100 s. The frequency of AC supply is the number of cycles per second. The time period is the duration of one cycle (T = 1\/f). AC current changes direction twice in every complete cycle.","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\/the-ac-mains-domestic-supply-current-in-india-changes-direction-in\/","og_locale":"en_US","og_type":"article","og_title":"The AC mains domestic supply current in India changes direction in","og_description":"The standard frequency of AC mains supply in India is 50 Hz. The frequency (f) is the number of complete cycles per second. The time period (T) of one complete cycle is given by T = 1\/f. For f = 50 Hz, T = 1\/50 s. In one complete cycle of alternating current, the current starts from zero, reaches a maximum in one direction, passes through zero, reaches a maximum in the opposite direction, and returns to zero. The current changes direction twice within one complete cycle (at the points where it crosses the zero line). Thus, the time taken for the current to change direction is half the time period. Time for direction change = T\/2 = (1\/50 s) \/ 2 = 1\/100 s. The frequency of AC supply is the number of cycles per second. The time period is the duration of one cycle (T = 1\/f). AC current changes direction twice in every complete cycle.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/the-ac-mains-domestic-supply-current-in-india-changes-direction-in\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:29:10+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\/the-ac-mains-domestic-supply-current-in-india-changes-direction-in\/","url":"https:\/\/exam.pscnotes.com\/mcq\/the-ac-mains-domestic-supply-current-in-india-changes-direction-in\/","name":"The AC mains domestic supply current in India changes direction in","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:29:10+00:00","dateModified":"2025-06-01T07:29:10+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The standard frequency of AC mains supply in India is 50 Hz. The frequency (f) is the number of complete cycles per second. The time period (T) of one complete cycle is given by T = 1\/f. For f = 50 Hz, T = 1\/50 s. In one complete cycle of alternating current, the current starts from zero, reaches a maximum in one direction, passes through zero, reaches a maximum in the opposite direction, and returns to zero. The current changes direction twice within one complete cycle (at the points where it crosses the zero line). Thus, the time taken for the current to change direction is half the time period. Time for direction change = T\/2 = (1\/50 s) \/ 2 = 1\/100 s. The frequency of AC supply is the number of cycles per second. The time period is the duration of one cycle (T = 1\/f). AC current changes direction twice in every complete cycle.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/the-ac-mains-domestic-supply-current-in-india-changes-direction-in\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/the-ac-mains-domestic-supply-current-in-india-changes-direction-in\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/the-ac-mains-domestic-supply-current-in-india-changes-direction-in\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-2","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-2\/"},{"@type":"ListItem","position":3,"name":"The AC mains domestic supply current in India changes direction in"}]},{"@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\/89090","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=89090"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/89090\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=89090"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=89090"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=89090"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}