{"id":247135,"date":"2025-07-07T14:54:30","date_gmt":"2025-07-07T14:54:30","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=247135"},"modified":"2025-07-07T14:54:32","modified_gmt":"2025-07-07T14:54:32","slug":"a-transmission-system-at-a-radio-station-uses-a-an-_-to-convert-a-direct-current-into-a-highfrequency-alternating-current","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/07\/a-transmission-system-at-a-radio-station-uses-a-an-_-to-convert-a-direct-current-into-a-highfrequency-alternating-current\/","title":{"rendered":"A transmission system at a radio station uses a\/an _ to convert a direct current into a highfrequency alternating current."},"content":{"rendered":"\n

A transmission system at a radio station uses a\/an _<\/em><\/strong> to convert a direct current into a highfrequency alternating current.<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

The correct answer is oscillator<\/strong>.<\/p>\n\n\n\n

In a radio station’s transmission system, an oscillator<\/strong> is used to convert direct current (DC) into high-frequency alternating current (AC). This process is essential for generating the carrier waves that carry the radio signals.<\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n
    \n
  1. Direct Current (DC) and Alternating Current (AC):<\/strong>\n
      \n
    • Direct current (DC) flows in a constant direction, while alternating current (AC) periodically reverses direction. In a radio transmission system, the alternating current is needed because radio waves themselves are oscillating electric and magnetic fields, which are AC in nature.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • Role of the Oscillator:<\/strong>\n
        \n
      • The oscillator in a radio station\u2019s transmitter takes the DC power (from a power supply) and transforms it into an AC signal at a desired high frequency. This high-frequency AC is the radio frequency<\/strong> (RF) signal.<\/li>\n\n\n\n
      • The oscillator works by creating periodic oscillations in the circuit, typically through the use of components like inductors and capacitors that work together to generate a frequency. The frequency produced is the carrier wave, which can range from a few kilohertz (kHz) to several megahertz (MHz), depending on the station\u2019s frequency band.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
      • Transmission of Radio Waves:<\/strong>\n
          \n
        • Once the oscillator generates the AC signal, it is fed into a modulator<\/strong>. The modulator superimposes the audio signal (the sound you want to broadcast) onto the carrier wave. The result is a modulated signal that is then amplified and transmitted by the radio station\u2019s antenna.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
        • Why an Oscillator is Needed:<\/strong>\n
            \n
          • Without an oscillator, the transmitter would not be able to generate the high-frequency carrier wave needed for radio transmission. The oscillator’s role is crucial because it ensures the correct frequency for the radio station\u2019s transmission, which is key to reaching the intended listeners on their radios.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n

            Thus, the oscillator serves as the cornerstone of the radio station\u2019s transmission system by converting DC to the high-frequency AC necessary for broadcasting.<\/p>\n\n\n\n

            \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

            A transmission system at a radio station uses a\/an _ to convert a direct current into a highfrequency alternating current. The Correct Answer and Explanation is: The correct answer is oscillator. In a radio station’s transmission system, an oscillator is used to convert direct current (DC) into high-frequency alternating current (AC). This process is essential […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-247135","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/247135","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=247135"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/247135\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=247135"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=247135"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=247135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}