{"id":14200,"date":"2023-09-25T02:21:10","date_gmt":"2023-09-25T02:21:10","guid":{"rendered":"https:\/\/staging.rayzeek.com\/?p=14200"},"modified":"2023-12-26T08:45:20","modified_gmt":"2023-12-26T08:45:20","slug":"what-is-cathode","status":"publish","type":"post","link":"https:\/\/staging.rayzeek.com\/pt_br\/glossary\/what-is-cathode\/","title":{"rendered":"O que \u00e9 c\u00e1todo"},"content":{"rendered":"<h2 class=\"wp-block-heading\" id=\"h-what-is-cathode\">O que \u00e9 c\u00e1todo<\/h2>\n\n\n<p class=\"wp-block-paragraph\">Um c\u00e1todo \u00e9 um eletrodo com carga negativa em uma l\u00e2mpada de descarga de g\u00e1s ou dispositivo el\u00e9trico. O c\u00e1todo \u00e9 respons\u00e1vel por emitir el\u00e9trons e facilitar o fluxo de corrente el\u00e9trica dentro do dispositivo.<\/p>\n<div class=\"insert_inquiry_outer_wrapper\"><h3>Procurando solu\u00e7\u00f5es de economia de energia ativadas por movimento?<\/h3><p>Entre em contato conosco para sensores de movimento PIR completos, produtos de economia de energia ativados por movimento, interruptores com sensor de movimento e solu\u00e7\u00f5es comerciais de Presen\u00e7a\/Aus\u00eancia (Occupancy\/Vacancy).<\/p><div class = \"insert_inquiry_buttons\"><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email\"><div><a href = \"mailto:info@rayzeek.com\"><p>Enviar um e-mail<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_email_contact\"><div><a href=\"https:\/\/www.rayzeek.com\/contact\"><p>Formul\u00e1rio de contato<\/p><\/a><\/div><\/div><div class = \"insert_inquiry_button_wrapper insert_inquiry_button_chat chat_jump\"><div><a href=\"#\"><p>Chat online<\/p><\/a><\/div><\/div><\/div><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Em l\u00e2mpadas de descarga de g\u00e1s, como l\u00e2mpadas de neon, o c\u00e1todo \u00e9 essencial para a produ\u00e7\u00e3o de luz como indicadores ou para fins de ilumina\u00e7\u00e3o especializada. Ele tamb\u00e9m \u00e9 utilizado em tubos de comuta\u00e7\u00e3o de c\u00e1todo frio, onde inicia e mant\u00e9m uma descarga luminosa necess\u00e1ria para fun\u00e7\u00f5es espec\u00edficas, como comuta\u00e7\u00e3o e contagem. Al\u00e9m disso, os tubos reguladores de tens\u00e3o dependem da tens\u00e3o relativamente constante gerada pela descarga luminosa do c\u00e1todo para estabilizar as tens\u00f5es da fonte de alimenta\u00e7\u00e3o em instrumentos baseados em tubos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">O c\u00e1todo tamb\u00e9m \u00e9 um componente fundamental em outros dispositivos, incluindo Dekatrons usados para contagem, tubos de flash para impulsos curtos e intensos de luz e tubos de raios cat\u00f3dicos empregados em v\u00e1rias aplica\u00e7\u00f5es de exibi\u00e7\u00e3o. \u00c9 importante notar que o c\u00e1todo n\u00e3o requer aquecimento externo para a emiss\u00e3o de el\u00e9trons, o que o distingue de um c\u00e1todo quente.<\/p>\n<div class=\"insert_portfolio_outer_wrapper\"><h3>Inspire-se com os portf\u00f3lios de sensores de movimento da Rayzeek.<\/h3><p>N\u00e3o encontrou o que procura? N\u00e3o se preocupe. Sempre existem formas alternativas de resolver seus problemas. Talvez um de nossos portf\u00f3lios possa ajudar.<\/p><div class = \"insert_portfolio_buttons\"><div class = \"insert_portfolio_button_wrapper\"><div><a href = \"https:\/\/www.rayzeek.com\/product-category\/motion-sensors\"><p>Sensores de Movimento PIR<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/motion-sensor-switches\"><p>Interruptores com Sensor de Movimento<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/occupancy-vacancy-sensors\"><p>Sensores de Presen\u00e7a<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/products\/rz050\"><p>Sensor de Movimento para Ar-Condicionado<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/motion-sensor-light-strip\"><p>Fitas de LED com Sensor de Movimento<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/dc-sensor-dimmer\"><p>Sensores de Movimento\/Dimmers de Baixa Tens\u00e3o DC<\/p><\/a><\/div><\/div><div class = \"insert_portfolio_button_wrapper\"><div><a href=\"https:\/\/www.rayzeek.com\/product-category\/wireless-motion-sensors\"><p>Kits de Sensores de Movimento Sem Fio<\/p><\/a><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faqs\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions\">Perguntas Frequentes<\/h2>\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-how-do-you-tell-if-it-s-a-cathode-or-anode\">Como saber se \u00e9 um c\u00e1todo ou um \u00e2nodo<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">O c\u00e1todo e o \u00e2nodo podem ser distinguidos com base em seu potencial. O eletrodo com um potencial mais alto \u00e9 o eletrodo positivo. Quando a bateria est\u00e1 sendo descarregada, o eletrodo positivo funciona como c\u00e1todo, enquanto o eletrodo negativo funciona como \u00e2nodo. Por outro lado, durante o processo de carga, o eletrodo positivo atua como \u00e2nodo, e o eletrodo negativo atua como c\u00e1todo.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-what-is-the-voltage-of-a-cold-cathode-lamp\">Qual \u00e9 a tens\u00e3o de uma l\u00e2mpada de c\u00e1todo frio<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">A maioria dos circuitos de l\u00e2mpadas fluorescentes de c\u00e1todo frio (CCFL) normalmente precisa de uma tens\u00e3o de entrada variando de 5V a 30V. Esses circuitos s\u00e3o projetados para funcionar melhor com correntes de l\u00e2mpada de 5mA ou superiores. Consequentemente, eles n\u00e3o s\u00e3o adequados para opera\u00e7\u00e3o de menor pot\u00eancia usando baterias de 2 ou 3 c\u00e9lulas comumente encontradas em computadores palmtop e dispositivos port\u00e1teis.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-is-a-cathode-positive-or-negative\">O c\u00e1todo \u00e9 positivo ou negativo<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">Os c\u00e1todos recebem o nome dos c\u00e1tions, que s\u00e3o \u00edons com carga positiva, enquanto os \u00e2nodos recebem o nome dos \u00e2nions, que s\u00e3o \u00edons com carga negativa. Em um dispositivo el\u00e9trico, o c\u00e1todo \u00e9 o eletrodo que carrega uma carga negativa.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-are-fluorescent-lights-cold-cathode\">As luzes fluorescentes s\u00e3o de c\u00e1todo frio<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">As l\u00e2mpadas de c\u00e1todo frio, como as l\u00e2mpadas fluorescentes de c\u00e1todo frio (CCFLs) e as l\u00e2mpadas de neon, enquadram-se na categoria de l\u00e2mpadas de c\u00e1todo frio. As l\u00e2mpadas de neon emitem luz ao excitar as mol\u00e9culas de g\u00e1s, enquanto as CCFLs geram luz ultravioleta por meio de uma descarga em vapor de merc\u00fario, o que aciona a emiss\u00e3o de luz vis\u00edvel a partir de um revestimento fluorescente dentro da l\u00e2mpada.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<div class=\"wp-block-group glossary_faq_q\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\"><h3 class=\"wp-block-heading\" id=\"h-what-is-an-example-of-a-hot-cathode-lamp\">Qual \u00e9 um exemplo de l\u00e2mpada de c\u00e1todo quente<\/h3><\/div><\/div>\n\n\n\n<div class=\"wp-block-group glossary_faq_a\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"wp-block-paragraph\">L\u00e2mpadas de c\u00e1todo frio, como l\u00e2mpadas de neon, tubos de letreiros de neon e l\u00e2mpadas de vapor de s\u00f3dio, s\u00e3o exemplos de l\u00e2mpadas com c\u00e1todo quente. Al\u00e9m disso, as l\u00e2mpadas de c\u00e1todo quente incluem l\u00e2mpadas de vapor de merc\u00fario de m\u00e9dia press\u00e3o e l\u00e2mpadas de vapor de merc\u00fario de baixa press\u00e3o, como tubos fluorescentes.<\/p>\n<\/div><\/div>\n<\/div><\/div>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Entre em contato conosco para sensores de movimento PIR completos, produtos de economia de energia ativados por movimento, interruptores com sensor de movimento e solu\u00e7\u00f5es comerciais de Ocupa\u00e7\u00e3o\/Vac\u00e2ncia.<\/p>","protected":false},"author":4,"featured_media":12864,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"article_term":"","article_term_alternate":"","article_term_def":"","article_hook":"","auto_links":"[{\"keyword\": \"gas-discharge lamp\", \"idxall\": 0, \"keywordtitlesimi\": 0.8284668922424316, \"keywordslugsimi\": 0.8284668922424316, \"paratitlesimi\": 0.7006882429122925, \"paraslugsimi\": 0.7006882429122925, \"slug\": \"what-is-discharge-lamp\", \"title\": \"What is Discharge Lamp\", \"id\": 12938}, {\"keyword\": \"neon lamps\", \"idxall\": 0, \"keywordtitlesimi\": 0.8084534406661987, \"keywordslugsimi\": 0.8084534406661987, \"paratitlesimi\": 0.6463078856468201, \"paraslugsimi\": 0.6463078856468201, \"slug\": \"what-is-neon-light\", \"title\": \"What is Neon Light\", \"id\": 14046}, {\"keyword\": \"gas-discharge lamps\", \"idxall\": 0, \"keywordtitlesimi\": 0.8010953068733215, \"keywordslugsimi\": 0.8010953068733215, \"paratitlesimi\": 0.6775931119918823, \"paraslugsimi\": 0.6775931119918823, \"slug\": \"what-is-discharge-lamp\", \"title\": \"What is Discharge Lamp\", \"id\": 12938}]","article_topic":"","article_fact_check":"","mt_social_share":"","mt_content_meta":"","mt_glossary_display":"","glossary_heading":"","glossary":"Cathode","glossary_alter":"","glossary_def":"","article_task":"","footnotes":""},"categories":[102],"tags":[99],"class_list":["post-14200","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glossary","tag-glossary"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is Cathode - Rayzeek<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Cathode - Rayzeek\" \/>\n<meta property=\"og:description\" content=\"Contact us for complete PIR motion sensors, motion-activated energy-saving products, motion sensor switches, and Occupancy\/Vacancy commercial solutions.S\" \/>\n<meta property=\"og:url\" content=\"https:\/\/staging.rayzeek.com\/pt_br\/ordliste\/what-is-cathode\/\" \/>\n<meta property=\"og:site_name\" content=\"Rayzeek\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/bester001\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/bester001\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-09-25T02:21:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-12-26T08:45:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2023\/06\/rayzeek-glossary-image-6.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Horace He\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@RayzeekTech\" \/>\n<meta name=\"twitter:site\" content=\"@RayzeekTech\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"Horace He\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. tempo de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/staging.rayzeek.com\/da\/ordliste\/what-is-cathode\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/staging.rayzeek.com\/da\/ordliste\/what-is-cathode\/\"},\"author\":{\"name\":\"Horace He\",\"@id\":\"https:\/\/staging.rayzeek.com\/#\/schema\/person\/ff0b4bd6573444e02efc8613274549c4\"},\"headline\":\"What is Cathode\",\"datePublished\":\"2023-09-25T02:21:10+00:00\",\"dateModified\":\"2023-12-26T08:45:20+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/staging.rayzeek.com\/da\/ordliste\/what-is-cathode\/\"},\"wordCount\":444,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/staging.rayzeek.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/staging.rayzeek.com\/da\/ordliste\/what-is-cathode\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/staging.rayzeek.com\/wp-content\/uploads\/2023\/06\/rayzeek-glossary-image-6.jpg\",\"keywords\":[\"glossary\"],\"articleSection\":[\"glossary\"],\"inLanguage\":\"pt-BR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/staging.rayzeek.com\/da\/ordliste\/what-is-cathode\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/staging.rayzeek.com\/da\/ordliste\/what-is-cathode\/\",\"url\":\"https:\/\/staging.rayzeek.com\/da\/ordliste\/what-is-cathode\/\",\"name\":\"What is Cathode - 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