{"id":88532,"date":"2025-06-01T07:14:06","date_gmt":"2025-06-01T07:14:06","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88532"},"modified":"2025-06-01T07:14:06","modified_gmt":"2025-06-01T07:14:06","slug":"which-one-of-the-following-statements-regarding-ohms-law-is-not-cor","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-regarding-ohms-law-is-not-cor\/","title":{"rendered":"Which one of the following statements regarding Ohm’s law is not cor"},"content":{"rendered":"

Which one of the following statements regarding Ohm’s law is not<\/b> correct ?<\/p>\n

[amp_mcq option1=”Ohm’s law is an assumption that current through a conductor is always directly proportional to the potential difference applied to it.” option2=”A conducting device obeys Ohm’s law when the resistance of a device is independent of magnitude and polarity of applied potential difference.” option3=”A conducting material obeys Ohm’s law when the resistance of material is independent of the magnitude and direction of applied electric field.” option4=”All homogeneous materials obey Ohm’s law irrespective of whether the field is within range or strong.” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct option is D) All homogeneous materials obey Ohm’s law irrespective of whether the field is within range or strong. This statement is incorrect.
\n<\/section>\n
\nOhm’s law states that the current through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature and other physical conditions remain unchanged (V = IR). A material or device is said to be “ohmic” if its resistance R is constant and independent of the applied voltage\/current\/electric field over a significant range.
\nStatements A, B, and C describe aspects of Ohm’s law or materials obeying it. Statement A describes Ohm’s law as the proportionality between V and I (though the “always” can be debated depending on interpretation, compared to D it’s less definitively wrong). Statements B and C correctly define an ohmic device\/material as one whose resistance is independent of the magnitude and direction of the applied potential difference\/electric field. Statement D is a universal claim that is false. Many homogeneous materials (e.g., semiconductors, diodes, electrolytes) do *not* obey Ohm’s law. Even ohmic materials like metals can deviate from Ohm’s law at very high electric fields or extreme temperatures.
\n<\/section>\n
\nMaterials that do not obey Ohm’s law are called non-ohmic materials. Their resistance can vary with voltage, current, field strength, temperature, etc. Examples include diodes, transistors, and gas discharge lamps.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements regarding Ohm’s law is not correct ? [amp_mcq option1=”Ohm’s law is an assumption that current through a conductor is always directly proportional to the potential difference applied to it.” option2=”A conducting device obeys Ohm’s law when the resistance of a device is independent of magnitude and polarity of applied … <\/p>\n

Detailed SolutionWhich one of the following statements regarding Ohm’s law is not cor<\/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":[1119,1201,1128],"class_list":["post-88532","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1119","tag-electric-current","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements regarding Ohm's law is not cor<\/title>\n<meta name=\"description\" content=\"The correct option is D) All homogeneous materials obey Ohm's law irrespective of whether the field is within range or strong. This statement is incorrect. Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature and other physical conditions remain unchanged (V = IR). A material or device is said to be "ohmic" if its resistance R is constant and independent of the applied voltage\/current\/electric field over a significant range. Statements A, B, and C describe aspects of Ohm's law or materials obeying it. Statement A describes Ohm's law as the proportionality between V and I (though the "always" can be debated depending on interpretation, compared to D it's less definitively wrong). Statements B and C correctly define an ohmic device\/material as one whose resistance is independent of the magnitude and direction of the applied potential difference\/electric field. Statement D is a universal claim that is false. Many homogeneous materials (e.g., semiconductors, diodes, electrolytes) do *not* obey Ohm's law. Even ohmic materials like metals can deviate from Ohm's law at very high electric fields or extreme temperatures.\" \/>\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-regarding-ohms-law-is-not-cor\/\" \/>\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 regarding Ohm's law is not cor\" \/>\n<meta property=\"og:description\" content=\"The correct option is D) All homogeneous materials obey Ohm's law irrespective of whether the field is within range or strong. This statement is incorrect. Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature and other physical conditions remain unchanged (V = IR). A material or device is said to be "ohmic" if its resistance R is constant and independent of the applied voltage\/current\/electric field over a significant range. Statements A, B, and C describe aspects of Ohm's law or materials obeying it. Statement A describes Ohm's law as the proportionality between V and I (though the "always" can be debated depending on interpretation, compared to D it's less definitively wrong). Statements B and C correctly define an ohmic device\/material as one whose resistance is independent of the magnitude and direction of the applied potential difference\/electric field. Statement D is a universal claim that is false. Many homogeneous materials (e.g., semiconductors, diodes, electrolytes) do *not* obey Ohm's law. Even ohmic materials like metals can deviate from Ohm's law at very high electric fields or extreme temperatures.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-regarding-ohms-law-is-not-cor\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:14:06+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=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which one of the following statements regarding Ohm's law is not cor","description":"The correct option is D) All homogeneous materials obey Ohm's law irrespective of whether the field is within range or strong. This statement is incorrect. Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature and other physical conditions remain unchanged (V = IR). A material or device is said to be \"ohmic\" if its resistance R is constant and independent of the applied voltage\/current\/electric field over a significant range. Statements A, B, and C describe aspects of Ohm's law or materials obeying it. Statement A describes Ohm's law as the proportionality between V and I (though the \"always\" can be debated depending on interpretation, compared to D it's less definitively wrong). Statements B and C correctly define an ohmic device\/material as one whose resistance is independent of the magnitude and direction of the applied potential difference\/electric field. Statement D is a universal claim that is false. Many homogeneous materials (e.g., semiconductors, diodes, electrolytes) do *not* obey Ohm's law. Even ohmic materials like metals can deviate from Ohm's law at very high electric fields or extreme temperatures.","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-regarding-ohms-law-is-not-cor\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements regarding Ohm's law is not cor","og_description":"The correct option is D) All homogeneous materials obey Ohm's law irrespective of whether the field is within range or strong. This statement is incorrect. Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature and other physical conditions remain unchanged (V = IR). A material or device is said to be \"ohmic\" if its resistance R is constant and independent of the applied voltage\/current\/electric field over a significant range. Statements A, B, and C describe aspects of Ohm's law or materials obeying it. Statement A describes Ohm's law as the proportionality between V and I (though the \"always\" can be debated depending on interpretation, compared to D it's less definitively wrong). Statements B and C correctly define an ohmic device\/material as one whose resistance is independent of the magnitude and direction of the applied potential difference\/electric field. Statement D is a universal claim that is false. Many homogeneous materials (e.g., semiconductors, diodes, electrolytes) do *not* obey Ohm's law. Even ohmic materials like metals can deviate from Ohm's law at very high electric fields or extreme temperatures.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-regarding-ohms-law-is-not-cor\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:14:06+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-regarding-ohms-law-is-not-cor\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-regarding-ohms-law-is-not-cor\/","name":"Which one of the following statements regarding Ohm's law is not cor","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:14:06+00:00","dateModified":"2025-06-01T07:14:06+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct option is D) All homogeneous materials obey Ohm's law irrespective of whether the field is within range or strong. This statement is incorrect. Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points, provided the temperature and other physical conditions remain unchanged (V = IR). A material or device is said to be \"ohmic\" if its resistance R is constant and independent of the applied voltage\/current\/electric field over a significant range. Statements A, B, and C describe aspects of Ohm's law or materials obeying it. Statement A describes Ohm's law as the proportionality between V and I (though the \"always\" can be debated depending on interpretation, compared to D it's less definitively wrong). Statements B and C correctly define an ohmic device\/material as one whose resistance is independent of the magnitude and direction of the applied potential difference\/electric field. Statement D is a universal claim that is false. Many homogeneous materials (e.g., semiconductors, diodes, electrolytes) do *not* obey Ohm's law. 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