{"id":46712,"date":"2024-04-15T22:16:19","date_gmt":"2024-04-15T22:16:19","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=46712"},"modified":"2024-04-15T22:16:19","modified_gmt":"2024-04-15T22:16:19","slug":"losses-which-occur-in-rotating-electric-machines-and-do-not-occur-in-trans-formers-are","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/losses-which-occur-in-rotating-electric-machines-and-do-not-occur-in-trans-formers-are\/","title":{"rendered":"Losses which occur in rotating electric machines and do not occur in trans formers are"},"content":{"rendered":"<p>[amp_mcq option1=&#8221;friction and windage losses&#8221; option2=&#8221;magnetic losses&#8221; option3=&#8221;hysteresis and eddy current losses&#8221; option4=&#8221;copper losses&#8221; correct=&#8221;option1&#8243;]<!--more--><\/p>\n<p>The correct answer is: A. friction and windage losses.<\/p>\n<p>Friction and windage losses are caused by the mechanical friction of the rotating parts of the machine and the air resistance of the rotating parts. These losses are not present in transformers because transformers do not have any rotating parts.<\/p>\n<p>Magnetic losses are caused by the eddy currents and hysteresis losses in the magnetic core of the machine. These losses are present in both rotating machines and transformers.<\/p>\n<p>Copper losses are caused by the resistance of the windings of the machine. These losses are present in both rotating machines and transformers.<\/p>\n<p>Here is a more detailed explanation of each option:<\/p>\n<ul>\n<li>Friction and windage losses are caused by the mechanical friction of the rotating parts of the machine and the air resistance of the rotating parts. These losses are not present in transformers because transformers do not have any rotating parts.<\/li>\n<li>Magnetic losses are caused by the eddy currents and hysteresis losses in the magnetic core of the machine. These losses are present in both rotating machines and transformers. Eddy currents are induced currents that flow in the magnetic core of the machine. These currents cause a loss of energy in the form of heat. Hysteresis losses are caused by the magnetic domains in the magnetic core of the machine constantly changing direction as the magnetic field changes. This also causes a loss of energy in the form of heat.<\/li>\n<li>Copper losses are caused by the resistance of the windings of the machine. These losses are present in both rotating machines and transformers. The resistance of the windings causes a voltage drop across the windings, which causes a loss of power in the form of heat.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;friction and windage losses&#8221; option2=&#8221;magnetic losses&#8221; option3=&#8221;hysteresis and eddy current losses&#8221; option4=&#8221;copper losses&#8221; correct=&#8221;option1&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[960],"tags":[],"class_list":["post-46712","post","type-post","status-publish","format-standard","hentry","category-transformers","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>Losses which occur in rotating electric machines and do not occur in trans formers are<\/title>\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\/losses-which-occur-in-rotating-electric-machines-and-do-not-occur-in-trans-formers-are\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Losses which occur in rotating electric machines and do not occur in trans formers are\" \/>\n<meta property=\"og:description\" content=\"[amp_mcq option1=&#8221;friction and windage losses&#8221; 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