{"id":53569,"date":"2024-04-15T23:55:54","date_gmt":"2024-04-15T23:55:54","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=53569"},"modified":"2024-04-15T23:55:54","modified_gmt":"2024-04-15T23:55:54","slug":"a-synchronous-motor-installed-at-the-receiving-end-substation-operates-with-such-an-excitation-that-it-takes-power-at-lagging-power-factor-now-if-the-applied-voltage-of-the-synchronous-motor-goes-dow","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/a-synchronous-motor-installed-at-the-receiving-end-substation-operates-with-such-an-excitation-that-it-takes-power-at-lagging-power-factor-now-if-the-applied-voltage-of-the-synchronous-motor-goes-dow\/","title":{"rendered":"A synchronous motor installed at the receiving end substation operates with such an excitation that it takes power at lagging power factor. Now if the applied voltage of the synchronous motor goes down, the power factor of the synchronous motor will"},"content":{"rendered":"<p>[amp_mcq option1=&#8221;remain same&#8221; option2=&#8221;go down&#8221; option3=&#8221;improve&#8221; option4=&#8221;none of the above&#8221; correct=&#8221;option2&#8243;]<!--more--><\/p>\n<p>The correct answer is B.<\/p>\n<p>When the applied voltage of a synchronous motor goes down, the motor will draw more current to maintain the same torque output. This increased current will cause the power factor of the motor to decrease.<\/p>\n<p>The power factor of a synchronous motor is the ratio of the real power (kW) to the apparent power (kVA). The real power is the power that is used to do work, while the apparent power is the total power that is drawn from the power supply. The power factor is a measure of how efficiently the motor is using the power supply.<\/p>\n<p>A lagging power factor means that the motor is drawing more reactive power (kVAr) than it is using real power (kW). This reactive power is used to create a magnetic field in the motor, but it does not contribute to the actual work that the motor is doing.<\/p>\n<p>When the applied voltage of a synchronous motor goes down, the motor will draw more current to maintain the same torque output. This increased current will cause the motor to draw more reactive power, which will cause the power factor to decrease.<\/p>\n<p>The following is a brief explanation of each option:<\/p>\n<ul>\n<li>Option A: The power factor will remain the same. This is not correct because the power factor will decrease when the applied voltage goes down.<\/li>\n<li>Option B: The power factor will go down. This is the correct answer.<\/li>\n<li>Option C: The power factor will improve. This is not correct because the power factor will decrease when the applied voltage goes down.<\/li>\n<li>Option D: None of the above. This is not correct because Option B is the correct answer.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;remain same&#8221; option2=&#8221;go down&#8221; option3=&#8221;improve&#8221; option4=&#8221;none of the above&#8221; correct=&#8221;option2&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[965],"tags":[],"class_list":["post-53569","post","type-post","status-publish","format-standard","hentry","category-synchronous-motors","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>A synchronous motor installed at the receiving end substation operates with such an excitation that it takes power at lagging power factor. Now if the applied voltage of the synchronous motor goes down, the power factor of the synchronous motor will<\/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\/a-synchronous-motor-installed-at-the-receiving-end-substation-operates-with-such-an-excitation-that-it-takes-power-at-lagging-power-factor-now-if-the-applied-voltage-of-the-synchronous-motor-goes-dow\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A synchronous motor installed at the receiving end substation operates with such an excitation that it takes power at lagging power factor. 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Now if the applied voltage of the synchronous motor goes down, the power factor of the synchronous motor will","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\/a-synchronous-motor-installed-at-the-receiving-end-substation-operates-with-such-an-excitation-that-it-takes-power-at-lagging-power-factor-now-if-the-applied-voltage-of-the-synchronous-motor-goes-dow\/","og_locale":"en_US","og_type":"article","og_title":"A synchronous motor installed at the receiving end substation operates with such an excitation that it takes power at lagging power factor. Now if the applied voltage of the synchronous motor goes down, the power factor of the synchronous motor will","og_description":"[amp_mcq option1=&#8221;remain same&#8221; option2=&#8221;go down&#8221; option3=&#8221;improve&#8221; option4=&#8221;none of the above&#8221; correct=&#8221;option2&#8243;]","og_url":"https:\/\/exam.pscnotes.com\/mcq\/a-synchronous-motor-installed-at-the-receiving-end-substation-operates-with-such-an-excitation-that-it-takes-power-at-lagging-power-factor-now-if-the-applied-voltage-of-the-synchronous-motor-goes-dow\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2024-04-15T23:55:54+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\/a-synchronous-motor-installed-at-the-receiving-end-substation-operates-with-such-an-excitation-that-it-takes-power-at-lagging-power-factor-now-if-the-applied-voltage-of-the-synchronous-motor-goes-dow\/","url":"https:\/\/exam.pscnotes.com\/mcq\/a-synchronous-motor-installed-at-the-receiving-end-substation-operates-with-such-an-excitation-that-it-takes-power-at-lagging-power-factor-now-if-the-applied-voltage-of-the-synchronous-motor-goes-dow\/","name":"A synchronous motor installed at the receiving end substation operates with such an excitation that it takes power at lagging power factor. 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