{"id":84664,"date":"2025-06-01T02:44:54","date_gmt":"2025-06-01T02:44:54","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=84664"},"modified":"2025-06-01T02:44:54","modified_gmt":"2025-06-01T02:44:54","slug":"which-one-of-the-following-statements-is-not-correct-8","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-8\/","title":{"rendered":"Which one of the following statements is not correct?"},"content":{"rendered":"

Which one of the following statements is not correct?<\/p>\n

[amp_mcq option1=”The cathode rays originate from cathode and proceed towards the anode in a cathode-ray discharge tube.” option2=”The television picture tubes are nothing but cathode-ray tubes.” option3=”The cathode rays themselves are not visible.” option4=”The characteristics of cathode rays depend upon the nature of the gas present in the cathode-ray tube.” correct=”option4″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC CDS-1 – 2017<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nStatement D is incorrect. Cathode rays are streams of electrons emitted from the cathode in a discharge tube. The properties of electrons, such as charge and mass, are fundamental constants and do not depend on the material of the cathode or the type of residual gas present in the tube. J.J. Thomson’s experiments showed that the charge-to-mass ratio of cathode rays was always the same, regardless of the source material.
\n<\/section>\n
\nStatements A, B, and C are correct. Cathode rays originate from the negatively charged cathode and travel towards the positively charged anode (A). Older television and computer monitors used Cathode Ray Tubes (CRTs) to produce images (B). The beam of electrons itself is not visible to the naked eye; the light is produced when the electrons strike a fluorescent screen (C).
\n<\/section>\n
\nThe discovery and study of cathode rays were crucial in the development of the understanding of the electron as a fundamental particle of matter.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements is not correct? [amp_mcq option1=”The cathode rays originate from cathode and proceed towards the anode in a cathode-ray discharge tube.” option2=”The television picture tubes are nothing but cathode-ray tubes.” option3=”The cathode rays themselves are not visible.” option4=”The characteristics of cathode rays depend upon the nature of the gas present … <\/p>\n

Detailed SolutionWhich one of the following statements is not correct?<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1087],"tags":[1101,1201,1128],"class_list":["post-84664","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1101","tag-electric-current","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements is not correct?<\/title>\n<meta name=\"description\" content=\"Statement D is incorrect. Cathode rays are streams of electrons emitted from the cathode in a discharge tube. The properties of electrons, such as charge and mass, are fundamental constants and do not depend on the material of the cathode or the type of residual gas present in the tube. J.J. Thomson's experiments showed that the charge-to-mass ratio of cathode rays was always the same, regardless of the source material. Statements A, B, and C are correct. Cathode rays originate from the negatively charged cathode and travel towards the positively charged anode (A). Older television and computer monitors used Cathode Ray Tubes (CRTs) to produce images (B). The beam of electrons itself is not visible to the naked eye; the light is produced when the electrons strike a fluorescent screen (C).\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-8\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following statements is not correct?\" \/>\n<meta property=\"og:description\" content=\"Statement D is incorrect. Cathode rays are streams of electrons emitted from the cathode in a discharge tube. The properties of electrons, such as charge and mass, are fundamental constants and do not depend on the material of the cathode or the type of residual gas present in the tube. J.J. Thomson's experiments showed that the charge-to-mass ratio of cathode rays was always the same, regardless of the source material. Statements A, B, and C are correct. Cathode rays originate from the negatively charged cathode and travel towards the positively charged anode (A). Older television and computer monitors used Cathode Ray Tubes (CRTs) to produce images (B). The beam of electrons itself is not visible to the naked eye; the light is produced when the electrons strike a fluorescent screen (C).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-8\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T02:44:54+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which one of the following statements is not correct?","description":"Statement D is incorrect. Cathode rays are streams of electrons emitted from the cathode in a discharge tube. The properties of electrons, such as charge and mass, are fundamental constants and do not depend on the material of the cathode or the type of residual gas present in the tube. J.J. Thomson's experiments showed that the charge-to-mass ratio of cathode rays was always the same, regardless of the source material. Statements A, B, and C are correct. Cathode rays originate from the negatively charged cathode and travel towards the positively charged anode (A). Older television and computer monitors used Cathode Ray Tubes (CRTs) to produce images (B). The beam of electrons itself is not visible to the naked eye; the light is produced when the electrons strike a fluorescent screen (C).","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-8\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements is not correct?","og_description":"Statement D is incorrect. Cathode rays are streams of electrons emitted from the cathode in a discharge tube. The properties of electrons, such as charge and mass, are fundamental constants and do not depend on the material of the cathode or the type of residual gas present in the tube. J.J. Thomson's experiments showed that the charge-to-mass ratio of cathode rays was always the same, regardless of the source material. Statements A, B, and C are correct. Cathode rays originate from the negatively charged cathode and travel towards the positively charged anode (A). Older television and computer monitors used Cathode Ray Tubes (CRTs) to produce images (B). The beam of electrons itself is not visible to the naked eye; the light is produced when the electrons strike a fluorescent screen (C).","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-8\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T02:44:54+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-8\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-8\/","name":"Which one of the following statements is not correct?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T02:44:54+00:00","dateModified":"2025-06-01T02:44:54+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Statement D is incorrect. Cathode rays are streams of electrons emitted from the cathode in a discharge tube. The properties of electrons, such as charge and mass, are fundamental constants and do not depend on the material of the cathode or the type of residual gas present in the tube. J.J. Thomson's experiments showed that the charge-to-mass ratio of cathode rays was always the same, regardless of the source material. Statements A, B, and C are correct. Cathode rays originate from the negatively charged cathode and travel towards the positively charged anode (A). Older television and computer monitors used Cathode Ray Tubes (CRTs) to produce images (B). The beam of electrons itself is not visible to the naked eye; the light is produced when the electrons strike a fluorescent screen (C).","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-8\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-8\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-8\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CDS-1","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-cds-1\/"},{"@type":"ListItem","position":3,"name":"Which one of the following statements is not correct?"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/84664","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=84664"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/84664\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=84664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=84664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=84664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}