{"id":85704,"date":"2025-06-01T03:25:09","date_gmt":"2025-06-01T03:25:09","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=85704"},"modified":"2025-06-01T03:25:09","modified_gmt":"2025-06-01T03:25:09","slug":"after-using-for-some-time-big-transformers-get-heated-up-this-is-due","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/","title":{"rendered":"After using for some time, big transformers get heated up. This is due"},"content":{"rendered":"<p>After using for some time, big transformers get heated up. This is due to the fact that<\/p>\n<ul>\n<li>1. current produces heat in the transformers<\/li>\n<li>2. hysteresis loss occurs in the transformers<\/li>\n<li>3. liquid used for cooling gets heated<\/li>\n<\/ul>\n<p>Select the correct answer using the code given below.<\/p>\n<p>[amp_mcq option1=&#8221;1 only&#8221; option2=&#8221;2 and 3 only&#8221; option3=&#8221;1 and 2 only&#8221; option4=&#8221;1, 2 and 3&#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 CDS-2 &#8211; 2017<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-cds-2-2017.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-cds-2-2017\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nTransformers get heated up due to current producing heat in the windings (copper loss), hysteresis loss in the core, and the liquid used for cooling getting heated as it absorbs these losses.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nThe main reasons for heating in a transformer are power losses occurring during its operation. These include copper losses (I\u00b2R losses) in the windings due to the resistance of the copper wires, and iron losses (core losses) in the core material. Iron losses consist of hysteresis loss (energy dissipated due to the repeated magnetization and demagnetization of the core by the alternating magnetic field) and eddy current loss (induced circulating currents in the core causing resistive heating). Statement 1 correctly identifies copper loss. Statement 2 correctly identifies hysteresis loss, which is one component of iron loss.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nLarge transformers often use oil or other liquids for cooling. This liquid absorbs the heat generated by the copper and iron losses and circulates, allowing the heat to be dissipated, usually through radiators. The fact that the liquid gets heated (Statement 3) is a direct consequence of the heat generated by losses (1 and 2, plus eddy currents) being transferred to the coolant. While not a primary *source* of heat generation like 1 and 2, the heating of the cooling liquid is an integral part of the thermal behavior and the overall &#8220;heated up&#8221; state of a large, operating transformer. Thus, all three facts listed contribute to understanding why big transformers get heated up.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>After using for some time, big transformers get heated up. This is due to the fact that 1. current produces heat in the transformers 2. hysteresis loss occurs in the transformers 3. liquid used for cooling gets heated Select the correct answer using the code given below. [amp_mcq option1=&#8221;1 only&#8221; option2=&#8221;2 and 3 only&#8221; option3=&#8221;1 &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"After using for some time, big transformers get heated up. This is due\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/#more-85704\">Detailed Solution<span class=\"screen-reader-text\">After using for some time, big transformers get heated up. This is due<\/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":[1088],"tags":[1101,1201,1128],"class_list":["post-85704","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-2","tag-1101","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>After using for some time, big transformers get heated up. This is due<\/title>\n<meta name=\"description\" content=\"Transformers get heated up due to current producing heat in the windings (copper loss), hysteresis loss in the core, and the liquid used for cooling getting heated as it absorbs these losses. The main reasons for heating in a transformer are power losses occurring during its operation. These include copper losses (I\u00b2R losses) in the windings due to the resistance of the copper wires, and iron losses (core losses) in the core material. Iron losses consist of hysteresis loss (energy dissipated due to the repeated magnetization and demagnetization of the core by the alternating magnetic field) and eddy current loss (induced circulating currents in the core causing resistive heating). Statement 1 correctly identifies copper loss. Statement 2 correctly identifies hysteresis loss, which is one component of iron loss.\" \/>\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\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"After using for some time, big transformers get heated up. This is due\" \/>\n<meta property=\"og:description\" content=\"Transformers get heated up due to current producing heat in the windings (copper loss), hysteresis loss in the core, and the liquid used for cooling getting heated as it absorbs these losses. The main reasons for heating in a transformer are power losses occurring during its operation. These include copper losses (I\u00b2R losses) in the windings due to the resistance of the copper wires, and iron losses (core losses) in the core material. Iron losses consist of hysteresis loss (energy dissipated due to the repeated magnetization and demagnetization of the core by the alternating magnetic field) and eddy current loss (induced circulating currents in the core causing resistive heating). Statement 1 correctly identifies copper loss. Statement 2 correctly identifies hysteresis loss, which is one component of iron loss.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:25:09+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":"After using for some time, big transformers get heated up. This is due","description":"Transformers get heated up due to current producing heat in the windings (copper loss), hysteresis loss in the core, and the liquid used for cooling getting heated as it absorbs these losses. The main reasons for heating in a transformer are power losses occurring during its operation. These include copper losses (I\u00b2R losses) in the windings due to the resistance of the copper wires, and iron losses (core losses) in the core material. Iron losses consist of hysteresis loss (energy dissipated due to the repeated magnetization and demagnetization of the core by the alternating magnetic field) and eddy current loss (induced circulating currents in the core causing resistive heating). Statement 1 correctly identifies copper loss. Statement 2 correctly identifies hysteresis loss, which is one component of iron loss.","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\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/","og_locale":"en_US","og_type":"article","og_title":"After using for some time, big transformers get heated up. This is due","og_description":"Transformers get heated up due to current producing heat in the windings (copper loss), hysteresis loss in the core, and the liquid used for cooling getting heated as it absorbs these losses. The main reasons for heating in a transformer are power losses occurring during its operation. These include copper losses (I\u00b2R losses) in the windings due to the resistance of the copper wires, and iron losses (core losses) in the core material. Iron losses consist of hysteresis loss (energy dissipated due to the repeated magnetization and demagnetization of the core by the alternating magnetic field) and eddy current loss (induced circulating currents in the core causing resistive heating). Statement 1 correctly identifies copper loss. Statement 2 correctly identifies hysteresis loss, which is one component of iron loss.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T03:25:09+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\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/","url":"https:\/\/exam.pscnotes.com\/mcq\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/","name":"After using for some time, big transformers get heated up. This is due","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T03:25:09+00:00","dateModified":"2025-06-01T03:25:09+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Transformers get heated up due to current producing heat in the windings (copper loss), hysteresis loss in the core, and the liquid used for cooling getting heated as it absorbs these losses. The main reasons for heating in a transformer are power losses occurring during its operation. These include copper losses (I\u00b2R losses) in the windings due to the resistance of the copper wires, and iron losses (core losses) in the core material. Iron losses consist of hysteresis loss (energy dissipated due to the repeated magnetization and demagnetization of the core by the alternating magnetic field) and eddy current loss (induced circulating currents in the core causing resistive heating). Statement 1 correctly identifies copper loss. Statement 2 correctly identifies hysteresis loss, which is one component of iron loss.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/after-using-for-some-time-big-transformers-get-heated-up-this-is-due\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CDS-2","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-cds-2\/"},{"@type":"ListItem","position":3,"name":"After using for some time, big transformers get heated up. 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