{"id":3931,"date":"2023-01-09T10:50:20","date_gmt":"2023-01-09T10:50:20","guid":{"rendered":"https:\/\/7thclass.deltapublications.in\/?page_id=3931"},"modified":"2024-12-13T06:23:53","modified_gmt":"2024-12-13T06:23:53","slug":"s-14-e-electric-bell","status":"publish","type":"page","link":"https:\/\/7thclass.deltapublications.in\/index.php\/s-14-e-electric-bell\/","title":{"rendered":"S-14.e Electric Bell"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Electric Bell<\/strong><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"434\" height=\"337\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/image-17.png\" alt=\"\" class=\"wp-image-15333\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/image-17.png 434w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2024\/12\/image-17-300x233.png 300w\" sizes=\"auto, (max-width: 434px) 100vw, 434px\" \/><\/figure><\/div>\n\n\n<p class=\"has-text-color has-huge-font-size\" style=\"color:#74008b\"><strong>Key Notes :<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-3454306e4699090bdc50cacf80e1ec71\" style=\"color:#000060\"><strong>1. What is an Electric Bell?<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>An <strong>electric bell<\/strong> is a device that produces a sound when an electric current passes through it.<\/li>\n\n\n\n<li>It is commonly used in schools, offices, and homes to signal or alert someone.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-1d9d94239a75256e87c51095643ed5d1\" style=\"color:#000060\"><strong>2. Components of an Electric Bell<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Electromagnet<\/strong>: A coil of wire wound around a metal core that becomes magnetic when electric current passes through it.<\/li>\n\n\n\n<li><strong>Hammer<\/strong>: A small piece of metal that strikes the bell.<\/li>\n\n\n\n<li><strong>Bell<\/strong>: The part that makes a ringing sound when struck by the hammer.<\/li>\n\n\n\n<li><strong>Spring<\/strong>: A spring to return the hammer to its original position after striking the bell.<\/li>\n\n\n\n<li><strong>Battery<\/strong>: Provides the electrical energy needed for the bell to function.<\/li>\n\n\n\n<li><strong>Switch<\/strong>: Turns the circuit on and off, controlling the flow of electricity.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-b9bd18cc7a5fac68163d8d77f2926918\" style=\"color:#000060\"><strong>3. Working Principle<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>When the switch is closed, the electric current flows through the coil of wire, making the electromagnet.<\/li>\n\n\n\n<li>The electromagnet attracts the hammer towards the bell, causing it to strike the bell and produce sound.<\/li>\n\n\n\n<li>The hammer is then pushed back by the spring to its original position, and the process repeats as long as the circuit is closed, creating a ringing sound.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-808ccc936b6c11c69c5d8a92629d7067\" style=\"color:#000060\"><strong>4. Types of Electric Bells<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Simple Electric Bell<\/strong>: Operates using the basic principle mentioned above.<\/li>\n\n\n\n<li><strong>Continuous Electric Bell<\/strong>: When the circuit is continuously closed, it keeps ringing without stopping until the switch is turned off.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-f94d68204f5da381d185abfa539e74b2\" style=\"color:#000060\"><strong>5. Applications<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Schools<\/strong>: To signal the start or end of classes.<\/li>\n\n\n\n<li><strong>Offices<\/strong>: To alert staff about important matters.<\/li>\n\n\n\n<li><strong>Doorbells<\/strong>: Used at entrances to alert people of visitors.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-74003a983aa47c01f638d4e4615e4e55\" style=\"color:#000060\"><strong>6. Safety Precautions<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li>Make sure the electric bell is properly insulated to prevent electric shocks.<\/li>\n\n\n\n<li>Ensure the battery or power supply is installed correctly.<\/li>\n\n\n\n<li>Check for damaged wires and avoid overloading the circuit.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<h3 class=\"wp-block-heading has-text-color has-link-color has-large-font-size wp-elements-c1d0d5b440003e08aa0dfcf95ea168c9\" style=\"color:#000060\"><strong>7. Important Terms<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list has-large-font-size\">\n<li><strong>Electromagnet<\/strong>: A magnet created by an electric current.<\/li>\n\n\n\n<li><strong>Circuit<\/strong>: A complete path through which electric current flows.<\/li>\n\n\n\n<li><strong>Conductor<\/strong>: A material that allows electric current to flow (e.g., copper wire).<\/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\/82459\/330\/147\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-64.png\" alt=\"\" class=\"wp-image-6038\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-64.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-64-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-64-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-3-64-400x400.png 400w\" 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\/81732\/555\/230\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-59.png\" alt=\"\" class=\"wp-image-6039\" srcset=\"https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-59.png 500w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-59-300x300.png 300w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-59-150x150.png 150w, https:\/\/7thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-2-59-400x400.png 400w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Electric Bell Key Notes : 1. What is an Electric Bell? 2. Components of an Electric Bell 3. Working Principle 4. Types of Electric Bells 5. Applications 6. Safety Precautions 7. Important Terms Let&#8217;s practice!<\/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,"footnotes":""},"class_list":["post-3931","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3931","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3931"}],"version-history":[{"count":12,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3931\/revisions"}],"predecessor-version":[{"id":15334,"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3931\/revisions\/15334"}],"wp:attachment":[{"href":"https:\/\/7thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3931"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}