{"id":89468,"date":"2021-12-27T10:07:33","date_gmt":"2021-12-27T10:07:33","guid":{"rendered":"https:\/\/prepistan.com\/blog\/?p=89468"},"modified":"2021-12-27T10:07:33","modified_gmt":"2021-12-27T10:07:33","slug":"vacuum-tubes-have-been-replaced-by","status":"publish","type":"post","link":"https:\/\/prepistan.com\/blog\/vacuum-tubes-have-been-replaced-by\/","title":{"rendered":"Vacuum tubes have been replaced by:"},"content":{"rendered":"<p>A. Conductors<br \/>\n<strong>B. Transistors<\/strong><br \/>\nC. Diodes<br \/>\nD. None of these<\/p>\n<p><strong>Explanation:<\/strong><\/p>\n<div class=\"wDYxhc\" lang=\"en-PK\" data-md=\"61\">\n<div class=\"LGOjhe\" role=\"heading\" data-attrid=\"wa:\/description\" aria-level=\"3\" data-hveid=\"CAgQAA\"><span class=\"ILfuVd NA6bn\"><span class=\"hgKElc\">In most applications, the vacuum tube is obsolete, having been replaced decades ago by\u00a0<b>the bipolar transistor<\/b>\u00a0and, more recently, by the field-effect transistor . However, tubes are still used in some high-power amplifiers, especially at microwave radio frequencies and in some hi-fi audio systems.<\/span><\/span><\/div>\n<\/div>\n<div class=\"g\">\n<div data-hveid=\"CAYQAA\" data-ved=\"2ahUKEwig1dOjwYL1AhVq5OAKHdsrCgcQFSgAegQIBhAA\">\n<div class=\"tF2Cxc\"><\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>A. Conductors B. Transistors C. Diodes D. None of these Explanation: In most applications, the vacuum tube is obsolete, having been replaced decades ago by\u00a0the bipolar transistor\u00a0and, more recently, by the field-effect transistor . However, tubes are still used in some high-power amplifiers, especially at microwave radio frequencies and in some hi-fi audio systems.<\/p>\n","protected":false},"author":2,"featured_media":52812,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[51,13,6],"tags":[26266,27164,27333],"class_list":{"0":"post-89468","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-everyday-science-mcqs","8":"category-fpsc","9":"category-nts","10":"tag-chemistry","11":"tag-css","12":"tag-nts"},"_links":{"self":[{"href":"https:\/\/prepistan.com\/blog\/wp-json\/wp\/v2\/posts\/89468","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prepistan.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prepistan.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prepistan.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/prepistan.com\/blog\/wp-json\/wp\/v2\/comments?post=89468"}],"version-history":[{"count":0,"href":"https:\/\/prepistan.com\/blog\/wp-json\/wp\/v2\/posts\/89468\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prepistan.com\/blog\/wp-json\/wp\/v2\/media\/52812"}],"wp:attachment":[{"href":"https:\/\/prepistan.com\/blog\/wp-json\/wp\/v2\/media?parent=89468"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prepistan.com\/blog\/wp-json\/wp\/v2\/categories?post=89468"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prepistan.com\/blog\/wp-json\/wp\/v2\/tags?post=89468"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}