{"id":273482,"date":"2025-07-27T13:40:28","date_gmt":"2025-07-27T13:40:28","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=273482"},"modified":"2025-07-27T13:40:31","modified_gmt":"2025-07-27T13:40:31","slug":"figure-18-2-shows-a-carrier-wave-modified-by-2","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/27\/figure-18-2-shows-a-carrier-wave-modified-by-2\/","title":{"rendered":"Figure 18-2 shows a carrier wave modified by"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

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

The correct answer is A. amplitude modulation<\/strong>.<\/p>\n\n\n\n

Although the specific image for “Figure 10-2” is not provided, the question describes a common scenario in physics and electronics textbooks. The answer is based on a detailed description of what each type of modulation looks like graphically.<\/p>\n\n\n\n

Explanation<\/strong><\/p>\n\n\n\n

Modulation is the process of varying a property of a high-frequency wave, called the carrier wave, in accordance with a lower-frequency information signal, like an audio or data signal. This is done to transmit information efficiently over long distances.<\/p>\n\n\n\n

A. Amplitude Modulation (AM)<\/strong>
In amplitude modulation, the amplitude, or the height and strength, of the high-frequency carrier wave is varied. This variation directly corresponds to the shape of the information signal. If you were to look at a graph of an AM wave, you would see a high-frequency wave whose peaks and troughs get larger and smaller. The overall shape formed by these changing peaks, known as the “envelope,” would perfectly match the original, lower-frequency information signal. The frequency of the carrier wave itself, meaning how close the individual waves are to each other, remains constant. This is the most common visual representation for a “modified carrier wave” in introductory examples.<\/p>\n\n\n\n

B. Frequency Modulation (FM)<\/strong>
In frequency modulation, the amplitude of the carrier wave remains constant. Instead, the frequency of the carrier wave is changed in proportion to the information signal. On a graph, an FM wave would have a constant height. However, the waves would be squeezed closer together (higher frequency) to represent a positive part of the information signal and spread further apart (lower frequency) to represent a negative part.<\/p>\n\n\n\n

C. Velocity Modulation<\/strong>
Velocity modulation is a different and more complex process primarily used in high-frequency devices like klystrons. It involves changing the velocity of an electron beam, which causes electrons to bunch together. This process is not typically represented by a simple waveform graph in the same context as AM and FM. Therefore, it is highly unlikely to be the correct answer for a standard figure showing a modified wave.<\/p>\n\n\n\n

Based on these descriptions, Figure 10-2 almost certainly shows a wave with a constant frequency but varying amplitude, which is the definition of amplitude modulation.<\/p>\n\n\n\n

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

The Correct Answer and Explanation is: The correct answer is A. amplitude modulation. Although the specific image for “Figure 10-2” is not provided, the question describes a common scenario in physics and electronics textbooks. The answer is based on a detailed description of what each type of modulation looks like graphically. Explanation Modulation is the process […]<\/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-273482","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/273482","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=273482"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/273482\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=273482"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=273482"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=273482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}