{"id":3257,"date":"2023-01-09T10:15:43","date_gmt":"2023-01-09T10:15:43","guid":{"rendered":"https:\/\/10thclass.deltapublications.in\/?page_id=3257"},"modified":"2024-12-31T17:08:22","modified_gmt":"2024-12-31T17:08:22","slug":"s-12-h-electric-power","status":"publish","type":"page","link":"https:\/\/10thclass.deltapublications.in\/index.php\/s-12-h-electric-power\/","title":{"rendered":"s-12.h Electric Power"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Electric Power<\/strong><\/h2>\n\n\n\n<p class=\"has-text-color has-link-color has-huge-font-size wp-elements-f79afd6ea8b322268468366b8e5f7cc7\" style=\"color:#74008b\"><strong>Key Notes:<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-edb60f79ba047315e36ab5d9c6e61c1f\" style=\"color:#000060;background-color:#dfc816\"><strong>Definition of Electric Power:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Electric power is the rate at which electrical energy is consumed or produced by an electrical device.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"640\" src=\"https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-58-2-1024x640.png\" alt=\"\" class=\"wp-image-16846\" style=\"width:492px;height:auto\" srcset=\"https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-58-2-1024x640.png 1024w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-58-2-300x188.png 300w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-58-2-768x480.png 768w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-58-2-1536x960.png 1536w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-58-2-1568x980.png 1568w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-58-2.png 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>It is the amount of energy used per unit time.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-63155fed581606cab7d573c933120849\" style=\"color:#000060;background-color:#dfc816\"><strong>Formula for Electric Power:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>The formula for electric power is: <\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-large-font-size\"><strong>P = VI<\/strong><\/p>\n\n\n\n<p class=\"has-text-color has-link-color has-large-font-size wp-elements-ca28fba281bade8f382fcecbbdcaa98c\" style=\"color:#000060\"><strong>where:<\/strong><\/p>\n\n\n\n<p class=\"has-large-font-size\">P = Power (in watts)<br>V = Voltage (in volts)<br>I = Current (in amperes)<\/p>\n\n\n\n<p class=\"has-large-font-size\">Another formula based on Ohm\u2019s Law is: <\/p>\n\n\n\n<p class=\"has-text-align-center has-large-font-size\"><strong>P = I<sup>2<\/sup>R or P = V<sup>2<\/sup>R<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-f3d4dd3ad397ae4576d36ad0b6e893af\" style=\"color:#000060;background-color:#dfc816\"><strong>SI Unit of Electric Power:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">The SI unit of electric power is the <strong>watt<\/strong> (W), where 1 watt equals 1 joule per second (1 W = 1 J\/s).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-3c106114e8e3fd4c777323e7c3f47cf0\" style=\"color:#000060;background-color:#dfc816\"><strong>Kilowatt and Megawatt:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li class=\"has-large-font-size\">Large quantities of power are expressed in <strong>kilowatts (kW)<\/strong> and <strong>megawatts (MW)<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-large-font-size\">1 kW = 1000 W, and 1 MW = 1,000,000 W.<\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-be5d226a04c7c10f660d96cfd35082d5\" style=\"color:#000060;background-color:#dfc816\"><strong>Electrical Energy Consumption:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Electrical energy consumed is calculated as: <\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-large-font-size\"><strong>Energy&nbsp;(in&nbsp;kWh) = Power&nbsp;(in&nbsp;kW) \u00d7 Time&nbsp;(in&nbsp;hours)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>The unit of electrical energy consumed in households is <strong>kilowatt-hour (kWh)<\/strong>, also known as a <strong>unit<\/strong> of electricity.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-e3f0c8e4e670b9e06642280edbed7d94\" style=\"color:#000060;background-color:#dfc816\"><strong>Applications of Electric Power:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Electric power is used in various devices like household appliances, industrial machinery, and transportation systems.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"640\" src=\"https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-59-2-1024x640.png\" alt=\"\" class=\"wp-image-16849\" style=\"width:378px;height:auto\" srcset=\"https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-59-2-1024x640.png 1024w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-59-2-300x188.png 300w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-59-2-768x480.png 768w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-59-2-1536x960.png 1536w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-59-2-1568x980.png 1568w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/Untitled-design-59-2.png 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>The amount of electric power used determines the electricity bill.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-b4d872f37f8ae8eeb696f36b3552eb62\" style=\"color:#000060;background-color:#dfc816\"><strong>Efficiency of Electrical Devices:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-large-font-size\">The efficiency of electrical devices is calculated using the ratio of useful power output to total power input, usually expressed as a percentage: <\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-large-font-size\"><strong>Efficiency = (Useful&nbsp;Power&nbsp;Output \/ Total&nbsp;Power&nbsp;Input)\u00d7100<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-7fbbc7b277e27b6cb76603e1a403d376\" style=\"color:#000060;background-color:#dfc816\"><strong>Power Rating of Devices:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Electrical devices have a power rating, indicating how much power they consume or deliver under standard operating conditions.<\/li>\n\n\n\n<li>For example, a 100 W light bulb consumes 100 watts of power when turned on.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-4425996f38f3cea6d68df0bd40e30e21\" style=\"color:#000060;background-color:#dfc816\"><strong>Role in Circuits:<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>In electrical circuits, the power dissipated by resistors, transferred by batteries, or consumed by other components is a crucial factor in designing and analyzing circuits.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-color has-large-font-size\" style=\"color:#d90000\"><strong>Let&#8217;s practice!<\/strong><\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/80483\/027\/955\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-47.png\" alt=\"\" class=\"wp-image-5581\" srcset=\"https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-47.png 500w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-47-300x300.png 300w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-47-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/80493\/669\/247\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-46.png\" alt=\"\" class=\"wp-image-5582\" srcset=\"https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-46.png 500w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-46-300x300.png 300w, https:\/\/10thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-46-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Electric Power Key Notes: Definition of Electric Power: Formula for Electric Power: P = VI where: P = Power (in watts)V = Voltage (in volts)I = Current (in amperes) Another formula based on Ohm\u2019s Law is: P = I2R or P = V2R SI Unit of Electric Power: Kilowatt and Megawatt: 1 kW = 1000<a class=\"more-link\" href=\"https:\/\/10thclass.deltapublications.in\/index.php\/s-12-h-electric-power\/\">Continue reading <span class=\"screen-reader-text\">&#8220;s-12.h Electric Power&#8221;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-3257","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/10thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3257","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/10thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/10thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/10thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/10thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3257"}],"version-history":[{"count":16,"href":"https:\/\/10thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3257\/revisions"}],"predecessor-version":[{"id":16850,"href":"https:\/\/10thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3257\/revisions\/16850"}],"wp:attachment":[{"href":"https:\/\/10thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3257"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}