{"id":85964,"date":"2025-06-01T03:33:15","date_gmt":"2025-06-01T03:33:15","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=85964"},"modified":"2025-06-01T03:33:15","modified_gmt":"2025-06-01T03:33:15","slug":"a-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/a-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en\/","title":{"rendered":"A 100 W electric bulb is used for 10 hours a day. How many units of en"},"content":{"rendered":"

A 100 W electric bulb is used for 10 hours a day. How many units of energy are consumed in 30 days ?<\/p>\n

[amp_mcq option1=”1″ option2=”10″ option3=”30″ option4=”300″ correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-2 – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is 30 units.
\n<\/section>\n
\nEnergy consumed is calculated as Power \u00d7 Time. Power is measured in Watts (W) or Kilowatts (kW), and Time is measured in hours (h). Energy is typically measured in Watt-hours (Wh) or Kilowatt-hours (kWh). One unit of electrical energy is equal to 1 kWh.
\n<\/section>\n
\nGiven power = 100 W = 0.1 kW (since 1 kW = 1000 W).
\nThe bulb is used for 10 hours a day for 30 days.
\nTotal time = 10 hours\/day \u00d7 30 days = 300 hours.
\nEnergy consumed = Power (kW) \u00d7 Total Time (h)
\nEnergy consumed = 0.1 kW \u00d7 300 h = 30 kWh.
\nSince 1 unit = 1 kWh, the energy consumed is 30 units.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

A 100 W electric bulb is used for 10 hours a day. How many units of energy are consumed in 30 days ? [amp_mcq option1=”1″ option2=”10″ option3=”30″ option4=”300″ correct=”option3″] This question was previously asked in UPSC CDS-2 – 2019 Download PDFAttempt Online The correct answer is 30 units. Energy consumed is calculated as Power \u00d7 … <\/p>\n

Detailed SolutionA 100 W electric bulb is used for 10 hours a day. How many units of en<\/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":[1119,1201,1128],"class_list":["post-85964","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-2","tag-1119","tag-electric-current","tag-physics","no-featured-image-padding"],"yoast_head":"\nA 100 W electric bulb is used for 10 hours a day. How many units of en<\/title>\n<meta name=\"description\" content=\"The correct answer is 30 units. Energy consumed is calculated as Power \u00d7 Time. Power is measured in Watts (W) or Kilowatts (kW), and Time is measured in hours (h). Energy is typically measured in Watt-hours (Wh) or Kilowatt-hours (kWh). One unit of electrical energy is equal to 1 kWh.\" \/>\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-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A 100 W electric bulb is used for 10 hours a day. How many units of en\" \/>\n<meta property=\"og:description\" content=\"The correct answer is 30 units. Energy consumed is calculated as Power \u00d7 Time. Power is measured in Watts (W) or Kilowatts (kW), and Time is measured in hours (h). Energy is typically measured in Watt-hours (Wh) or Kilowatt-hours (kWh). One unit of electrical energy is equal to 1 kWh.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/a-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:33:15+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":"A 100 W electric bulb is used for 10 hours a day. How many units of en","description":"The correct answer is 30 units. Energy consumed is calculated as Power \u00d7 Time. Power is measured in Watts (W) or Kilowatts (kW), and Time is measured in hours (h). Energy is typically measured in Watt-hours (Wh) or Kilowatt-hours (kWh). One unit of electrical energy is equal to 1 kWh.","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-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en\/","og_locale":"en_US","og_type":"article","og_title":"A 100 W electric bulb is used for 10 hours a day. How many units of en","og_description":"The correct answer is 30 units. Energy consumed is calculated as Power \u00d7 Time. Power is measured in Watts (W) or Kilowatts (kW), and Time is measured in hours (h). Energy is typically measured in Watt-hours (Wh) or Kilowatt-hours (kWh). One unit of electrical energy is equal to 1 kWh.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/a-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T03:33:15+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-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en\/","url":"https:\/\/exam.pscnotes.com\/mcq\/a-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en\/","name":"A 100 W electric bulb is used for 10 hours a day. How many units of en","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T03:33:15+00:00","dateModified":"2025-06-01T03:33:15+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is 30 units. Energy consumed is calculated as Power \u00d7 Time. Power is measured in Watts (W) or Kilowatts (kW), and Time is measured in hours (h). Energy is typically measured in Watt-hours (Wh) or Kilowatt-hours (kWh). One unit of electrical energy is equal to 1 kWh.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/a-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/a-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/a-100-w-electric-bulb-is-used-for-10-hours-a-day-how-many-units-of-en\/#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":"A 100 W electric bulb is used for 10 hours a day. How many units of en"}]},{"@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\/85964","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=85964"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/85964\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=85964"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=85964"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=85964"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}