{"id":88559,"date":"2025-06-01T07:14:49","date_gmt":"2025-06-01T07:14:49","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88559"},"modified":"2025-06-01T07:14:49","modified_gmt":"2025-06-01T07:14:49","slug":"water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp\/","title":{"rendered":"Water is heated with a coil of resistance R connected to domestic supp"},"content":{"rendered":"

Water is heated with a coil of resistance R connected to domestic supply. The rise of temperature of water will depend on
\n1. Supply voltage.
\n2. Current passing through the coil.
\n3. Time for which voltage is supplied.
\nSelect the correct answer from among the following :<\/p>\n

[amp_mcq option1=”1, 2 and 3″ option2=”1 and 2 only” option3=”1 only” option4=”2 and 3 only” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is A) 1, 2 and 3.
\n<\/section>\n
\nWhen a resistance coil is connected to a domestic supply, it generates heat according to Joule’s law of heating. The heat produced (H) is given by $H = I^2 R t$, where I is the current, R is the resistance, and t is the time. Using Ohm’s law ($V = IR$), this can also be expressed as $H = \\frac{V^2}{R} t$ or $H = V I t$. The rise in temperature of the water is proportional to the heat supplied to it. Therefore, the rise in temperature depends on the supply voltage (V), the current passing through the coil (I), and the time for which the voltage is supplied (t). All three factors influence the amount of heat generated and transferred to the water.
\n<\/section>\n
\nThe specific heat capacity and mass of the water also influence the final temperature rise, but the question asks what the heat *production* (and thus potential temperature rise) depends on from the given options related to the electrical supply and coil. The supply voltage and the resistance of the coil determine the current ($I = V\/R$). So, if voltage and time are given, the current is implicitly determined by the resistance, and heat depends on V, R, and t. If voltage and current are given, resistance is implicitly determined ($R=V\/I$), and heat depends on V, I, and t. If current, resistance, and time are given, heat is directly $I^2 R t$. Since the options list voltage, current, and time separately, it means that the heat produced (and temperature rise) is a function of all these parameters in one form of the heat equation or another.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Water is heated with a coil of resistance R connected to domestic supply. The rise of temperature of water will depend on 1. Supply voltage. 2. Current passing through the coil. 3. Time for which voltage is supplied. Select the correct answer from among the following : [amp_mcq option1=”1, 2 and 3″ option2=”1 and 2 … <\/p>\n

Detailed SolutionWater is heated with a coil of resistance R connected to domestic supp<\/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":[1119,1201,1128],"class_list":["post-88559","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1119","tag-electric-current","tag-physics","no-featured-image-padding"],"yoast_head":"\nWater is heated with a coil of resistance R connected to domestic supp<\/title>\n<meta name=\"description\" content=\"The correct answer is A) 1, 2 and 3. When a resistance coil is connected to a domestic supply, it generates heat according to Joule's law of heating. The heat produced (H) is given by $H = I^2 R t$, where I is the current, R is the resistance, and t is the time. Using Ohm's law ($V = IR$), this can also be expressed as $H = frac{V^2}{R} t$ or $H = V I t$. The rise in temperature of the water is proportional to the heat supplied to it. Therefore, the rise in temperature depends on the supply voltage (V), the current passing through the coil (I), and the time for which the voltage is supplied (t). All three factors influence the amount of heat generated and transferred to the water.\" \/>\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\/water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Water is heated with a coil of resistance R connected to domestic supp\" \/>\n<meta property=\"og:description\" content=\"The correct answer is A) 1, 2 and 3. When a resistance coil is connected to a domestic supply, it generates heat according to Joule's law of heating. The heat produced (H) is given by $H = I^2 R t$, where I is the current, R is the resistance, and t is the time. Using Ohm's law ($V = IR$), this can also be expressed as $H = frac{V^2}{R} t$ or $H = V I t$. The rise in temperature of the water is proportional to the heat supplied to it. Therefore, the rise in temperature depends on the supply voltage (V), the current passing through the coil (I), and the time for which the voltage is supplied (t). All three factors influence the amount of heat generated and transferred to the water.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:14:49+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":"Water is heated with a coil of resistance R connected to domestic supp","description":"The correct answer is A) 1, 2 and 3. When a resistance coil is connected to a domestic supply, it generates heat according to Joule's law of heating. The heat produced (H) is given by $H = I^2 R t$, where I is the current, R is the resistance, and t is the time. Using Ohm's law ($V = IR$), this can also be expressed as $H = frac{V^2}{R} t$ or $H = V I t$. The rise in temperature of the water is proportional to the heat supplied to it. Therefore, the rise in temperature depends on the supply voltage (V), the current passing through the coil (I), and the time for which the voltage is supplied (t). All three factors influence the amount of heat generated and transferred to the water.","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\/water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp\/","og_locale":"en_US","og_type":"article","og_title":"Water is heated with a coil of resistance R connected to domestic supp","og_description":"The correct answer is A) 1, 2 and 3. When a resistance coil is connected to a domestic supply, it generates heat according to Joule's law of heating. The heat produced (H) is given by $H = I^2 R t$, where I is the current, R is the resistance, and t is the time. Using Ohm's law ($V = IR$), this can also be expressed as $H = frac{V^2}{R} t$ or $H = V I t$. The rise in temperature of the water is proportional to the heat supplied to it. Therefore, the rise in temperature depends on the supply voltage (V), the current passing through the coil (I), and the time for which the voltage is supplied (t). All three factors influence the amount of heat generated and transferred to the water.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:14:49+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\/water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp\/","url":"https:\/\/exam.pscnotes.com\/mcq\/water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp\/","name":"Water is heated with a coil of resistance R connected to domestic supp","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:14:49+00:00","dateModified":"2025-06-01T07:14:49+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is A) 1, 2 and 3. When a resistance coil is connected to a domestic supply, it generates heat according to Joule's law of heating. The heat produced (H) is given by $H = I^2 R t$, where I is the current, R is the resistance, and t is the time. Using Ohm's law ($V = IR$), this can also be expressed as $H = \\frac{V^2}{R} t$ or $H = V I t$. The rise in temperature of the water is proportional to the heat supplied to it. Therefore, the rise in temperature depends on the supply voltage (V), the current passing through the coil (I), and the time for which the voltage is supplied (t). All three factors influence the amount of heat generated and transferred to the water.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/water-is-heated-with-a-coil-of-resistance-r-connected-to-domestic-supp\/#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":"Water is heated with a coil of resistance R connected to domestic supp"}]},{"@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\/88559","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=88559"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88559\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=88559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=88559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=88559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}