{"id":88309,"date":"2025-06-01T07:07:35","date_gmt":"2025-06-01T07:07:35","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88309"},"modified":"2025-06-01T07:07:35","modified_gmt":"2025-06-01T07:07:35","slug":"which-one-of-the-following-statements-is-not-correct-38","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-38\/","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 SI unit of charge is ampere-second” option2=”Debye is the unit of dipole moment” option3=”Resistivity of a wire of length l and area of cross-section a depends upon both l and a” option4=”The kinetic energy of an electron of mass m kg and charge e coulomb, when accelerated through a potential difference of V volt, is eV joule” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2016<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is C) Resistivity of a wire of length l and area of cross-section a depends upon both l and a. This statement is incorrect. Resistivity ($\\rho$) is an intrinsic property of the material of the wire and depends only on the material composition and temperature, not on its dimensions (length ‘l’ or area of cross-section ‘a’). The resistance (R) of the wire depends on resistivity, length, and area (R = $\\rho$ * l\/a).
\n<\/section>\n
\n– Resistivity is a material property.
\n– Resistance depends on material, length, and area.
\n– Charge unit is Coulomb (C) or Ampere-second (A\u00b7s).
\n– Debye is a unit for electric dipole moment.
\n– Kinetic energy gained by a charge ‘e’ accelerated by potential ‘V’ is eV.
\n<\/section>\n
\n– Statement A is correct: The SI unit of charge is Coulomb (C), and 1 Coulomb = 1 Ampere * 1 second (C = A\u00b7s).
\n– Statement B is correct: Debye (D) is a common unit used to measure the electric dipole moment of molecules.
\n– Statement D is correct: When a charge ‘e’ is accelerated through a potential difference ‘V’, the work done on the charge is W = V * e. By the work-energy theorem, this work is converted into kinetic energy, so Kinetic Energy = eV.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements is not correct ? [amp_mcq option1=”The SI unit of charge is ampere-second” option2=”Debye is the unit of dipole moment” option3=”Resistivity of a wire of length l and area of cross-section a depends upon both l and a” option4=”The kinetic energy of an electron of mass m kg and charge … <\/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":[1094],"tags":[1098,1140,1128],"class_list":["post-88309","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1098","tag-measurement-unit","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements is not correct ?<\/title>\n<meta name=\"description\" content=\"The correct answer is C) Resistivity of a wire of length l and area of cross-section a depends upon both l and a. This statement is incorrect. Resistivity ($rho$) is an intrinsic property of the material of the wire and depends only on the material composition and temperature, not on its dimensions (length 'l' or area of cross-section 'a'). The resistance (R) of the wire depends on resistivity, length, and area (R = $rho$ * l\/a). - Resistivity is a material property. - Resistance depends on material, length, and area. - Charge unit is Coulomb (C) or Ampere-second (A\u00b7s). - Debye is a unit for electric dipole moment. - Kinetic energy gained by a charge 'e' accelerated by potential 'V' is eV.\" \/>\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-38\/\" \/>\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=\"The correct answer is C) Resistivity of a wire of length l and area of cross-section a depends upon both l and a. This statement is incorrect. Resistivity ($rho$) is an intrinsic property of the material of the wire and depends only on the material composition and temperature, not on its dimensions (length 'l' or area of cross-section 'a'). The resistance (R) of the wire depends on resistivity, length, and area (R = $rho$ * l\/a). - Resistivity is a material property. - Resistance depends on material, length, and area. - Charge unit is Coulomb (C) or Ampere-second (A\u00b7s). - Debye is a unit for electric dipole moment. - Kinetic energy gained by a charge 'e' accelerated by potential 'V' is eV.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-38\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:07:35+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":"The correct answer is C) Resistivity of a wire of length l and area of cross-section a depends upon both l and a. 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The resistance (R) of the wire depends on resistivity, length, and area (R = $rho$ * l\/a). - Resistivity is a material property. - Resistance depends on material, length, and area. - Charge unit is Coulomb (C) or Ampere-second (A\u00b7s). - Debye is a unit for electric dipole moment. - Kinetic energy gained by a charge 'e' accelerated by potential 'V' is eV.","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-38\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements is not correct ?","og_description":"The correct answer is C) Resistivity of a wire of length l and area of cross-section a depends upon both l and a. This statement is incorrect. 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The resistance (R) of the wire depends on resistivity, length, and area (R = $rho$ * l\/a). - Resistivity is a material property. - Resistance depends on material, length, and area. - Charge unit is Coulomb (C) or Ampere-second (A\u00b7s). - Debye is a unit for electric dipole moment. - Kinetic energy gained by a charge 'e' accelerated by potential 'V' is eV.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-38\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:07:35+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-38\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-38\/","name":"Which one of the following statements is not correct ?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:07:35+00:00","dateModified":"2025-06-01T07:07:35+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is C) Resistivity of a wire of length l and area of cross-section a depends upon both l and a. 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