{"id":17686,"date":"2023-12-02T04:15:29","date_gmt":"2023-12-01T22:45:29","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=17686"},"modified":"2025-04-05T05:56:48","modified_gmt":"2025-04-05T00:26:48","slug":"piezoelectricity","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/piezoelectricity\/","title":{"rendered":"Piezoelectricity"},"content":{"rendered":"<h2>About Piezoelectricity<\/h2>\n<ul>\n<li>The term \u201cpiezoelectric\u201d originates from the Greek words \u201cpiezein,\u201d meaning \u2018to squeeze\u2019, and \u201celektron\u201d, for amber \u2013 a material known for its\u00a0association with static electricity.<\/li>\n<li>Piezoelectricity is a remarkable phenomenon whereby some materials \u2013 including quartz, ceramics such as lead zirconate titanate (PZT), and even certain biological substances like bone and the tendons \u2013 can\u00a0generate an electric charge in response to mechanical stress.<\/li>\n<li>This property is the\u00a0result of their unusual crystal structures.<\/li>\n<li>Usually, the charges on atoms in the molecules that make them up are symmetric on two sides of an axis.<\/li>\n<li>When some stress is applied, the molecule becomes distorted and the asymmetry of charges gives rise to a small electric current.<\/li>\n<li>Some materials also display an\u00a0inverse piezoelectric effect, where the application of an electric current induces a mechanical deformation.<\/li>\n<li>Applications\n<ul>\n<li>Both direct and inverse piezoelectric materials are widely used\u00a0in pressure sensors, accelerometers, and acoustic devices\u00a0\u2013 where their ability to convert mechanical signals into electrical signals is crucial.<\/li>\n<li>It is also used in\u00a0quartz watches.<\/li>\n<li>Piezoelectric transducers are common\u00a0in ultrasonic applications, such as intrusion detectors and alarms.\u00a0<\/li>\n<li>Piezoelectric devices are employed at AF (audio frequencies) as\u00a0pickups, microphones, earphones, beepers, and buzzers.\u00a0<\/li>\n<li>In wireless applications, piezoelectricity makes it possible to use crystals and ceramics as oscillators that generate predictable and stable signals at RF (radio frequencies).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1) What is Quartz?<\/h3>\n<p>It is a widely distributed mineral of many varieties that consists primarily of silica, or silicon dioxide.\u00a0It is a crystal that develops positive and negative charges on alternate prism edges when it is subjected to pressure or tension. The charges are proportional to the change in pressure.\u00a0<\/p>\n<p><strong>Source:<\/strong> <a href=\"https:\/\/www.thehindu.com\/sci-tech\/science\/piezoelectricity-why-quartz-ticks\/article67576333.ece\" target=\"_blank\" rel=\"nofollow noopener\"><u>Piezoelectricity: Why quartz ticks<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Piezoelectricity is a remarkable phenomenon whereby some materials generate an electric charge in response to mechanical stress.<\/p>\n","protected":false},"author":5,"featured_media":17687,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-17686","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/17686","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=17686"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/17686\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/17687"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=17686"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=17686"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=17686"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}