{"id":18772,"date":"2024-04-15T05:30:38","date_gmt":"2024-04-15T05:30:38","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=18772"},"modified":"2024-04-15T05:30:38","modified_gmt":"2024-04-15T05:30:38","slug":"the-refresh-vector-crt-uses-which-of-the-following-techniques-a-the-beam-constantly-travels-across-the-screen-to-turn-on-off-a-series-of-pixels-b-makes-changes-on-the-image-by-increasing-the-anode","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-refresh-vector-crt-uses-which-of-the-following-techniques-a-the-beam-constantly-travels-across-the-screen-to-turn-on-off-a-series-of-pixels-b-makes-changes-on-the-image-by-increasing-the-anode\/","title":{"rendered":"The refresh-vector CRT uses which of the following techniques? A. The beam constantly travels across the screen to turn on\/off a series of pixels. B. Makes changes on the image by increasing the anode voltage. C. Uses an electron gun to continuously flood the surface of the tube. D. Creates images on the screen by scanning straight-line vectors between selected points. E. None of the above"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6a9ae42d30f3c\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    The beam constantly travels across the screen to turn on\/off a series of pixels.                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    Makes changes on the image by increasing the anode voltage.                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    Uses an electron gun to continuously flood the surface of the tube.                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"true\">\r\n                    Creates images on the screen by scanning straight-line vectors between selected points. E. None of the above                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is: D. Creates images on the screen by scanning straight-line vectors between selected points.<\/p>\n<p>A refresh-vector CRT is a type of cathode ray tube (CRT) that uses a technique called vector scanning to create images on the screen. In vector scanning, the electron beam is not constantly moving across the screen, <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> but instead is used to draw lines between selected points. This allows for the creation of smooth, curved lines and shapes, which are not possible with raster scanning, the other main type of CRT scanning.<\/p>\n<p>Option A is incorrect because the beam does not constantly travel across the screen. Instead, it is used to draw lines between selected points.<\/p>\n<p>Option B is incorrect because the anode voltage is not used <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> to make changes on the image. Instead, the anode voltage is used to accelerate the electron beam.<\/p>\n<p>Option C is incorrect because the electron gun does not continuously flood the surface of the tube. Instead, it is used to emit a stream of electrons that are focused into a beam.<\/p>\n<p>Option E is incorrect because the refresh-vector CRT does use the technique described in option D.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Join Our Telegram Channel Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[680],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The refresh-vector CRT uses which of the following techniques? A. The beam constantly travels across the screen to turn on\/off a series of pixels. B. 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