{"id":68621,"date":"2025-08-06T02:22:17","date_gmt":"2025-08-06T02:22:17","guid":{"rendered":"https:\/\/onlineexammaker.com\/kb\/20-electric-resistor-quiz-questions-and-answers\/"},"modified":"2025-08-06T02:22:17","modified_gmt":"2025-08-06T02:22:17","slug":"20-electric-resistor-quiz-questions-and-answers","status":"publish","type":"post","link":"https:\/\/onlineexammaker.com\/kb\/20-electric-resistor-quiz-questions-and-answers\/","title":{"rendered":"20 Electric Resistor Quiz Questions and Answers"},"content":{"rendered":"<p>An electric resistor is a fundamental passive electrical component that opposes the flow of current in a circuit, thereby controlling voltage and current levels. It functions based on Ohm&#8217;s Law, where resistance (R) is measured in ohms (\u03a9), and the relationship is given by V = I \u00d7 R, with voltage (V) in volts and current (I) in amperes.<\/p>\n<p>Resistors are categorized into types such as fixed resistors (e.g., carbon film, metal film), which maintain a constant value, and variable resistors (e.g., potentiometers, rheostats), which allow adjustment. Key specifications include resistance value, power rating (watts), tolerance (percentage accuracy), and temperature coefficient.<\/p>\n<p>Common applications include limiting current in LED circuits, dividing voltages in signal processing, providing bias in transistors, and acting as loads in power supplies. Resistors also play roles in sensors like thermistors (temperature-dependent) and photodetectors.<\/p>\n<p>In circuit design, resistors help manage heat dissipation, prevent short circuits, and ensure stability, making them essential in electronics from simple devices to complex systems like computers and telecommunications equipment.<\/p>\n<h3>Table of contents<\/h3>\n<ul class=\"article_list\">\n<li><a href=\"#1\">Part 1: OnlineExamMaker AI quiz generator &#8211; The easiest way to make quizzes online<\/a><\/li>\n<li><a href=\"#2\">Part 2: 20 electric resistor quiz questions &#038; answers<\/a><\/li>\n<li><a href=\"#3\">Part 3: OnlineExamMaker AI Question Generator: Generate questions for any topic <\/a><\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/onlineexammaker.com\/kb\/wp-content\/uploads\/2025\/08\/1652-electric-resistor.webp\" alt=\"\"\/><\/p>\n<h3 id=\"1\">Part 1: OnlineExamMaker AI quiz generator &#8211; The easiest way to make quizzes online<\/h3>\n<p>Are you looking for an online assessment to test the electric resistor knowledge of your learners? OnlineExamMaker uses artificial intelligence to help quiz organizers to create, manage, and analyze exams or tests automatically. Apart from AI features, OnlineExamMaker advanced security features such as full-screen lockdown browser, online webcam proctoring, and face ID recognition.<\/p>\n<p><strong>Take a product tour of OnlineExamMaker:<\/strong><br \/>\n\u25cf Includes a safe exam browser (lockdown mode), webcam and screen recording, live monitoring, and chat oversight to prevent cheating.<br \/>\n\u25cf AI Exam Grader for efficiently grading quizzes and assignments, offering inline comments, automatic scoring, and &#8220;fudge points&#8221; for manual adjustments.<br \/>\n\u25cf Embed quizzes on websites, blogs, or share via email, social media (Facebook, Twitter), or direct links.<br \/>\n\u25cf Handles large-scale testing (thousands of exams\/semester) without internet dependency, backed by cloud infrastructure.<\/p>\n<div class=\"embed_video_blog\">\n<div class=\"embed-responsive embed-responsive-16by9\" style=\"margin-bottom:16px;\">\n <iframe class=\"embed-responsive-item\" src=\"https:\/\/www.youtube.com\/embed\/zlqho9igH2Y\"><\/iframe>\n<\/div>\n<\/div>\n<div class=\"getstarted-container\">\n<p style=\"margin-bottom: 13px;\">Automatically generate questions using AI<\/p>\n<div class=\"blog_double_btn clearfix\">\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/features\/ai-question-generator.html?refer=download_questions\" target=\"_blank\" rel=\"noopener\">Try AI Question Generator<\/a><\/div>\n<div class=\"p-style-b\">Generate questions for any topic<\/div>\n<\/div>\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/sign-up.html?refer=blog_btn\"> Create A Quiz<\/a><\/div>\n<div class=\"p-style-b\">100% free forever<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 id=\"2\">Part 2: 20 electric resistor quiz questions &#038; answers<\/h3>\n<p><button id=\"copyquestionsBtn\" type=\"button\" onclick=\"myFunction()\">Copy Quiz Questions<\/button>\u00a0\u00a0or\u00a0\u00a0<button id=\"genquestionsBtn\" class=\"genbtnstyle\" type=\"button\" onclick=\"myFunction1()\">Generate Questions using AI<\/button><\/p>\n<div id=\"copy_questions\">\n<p>1. <strong>Question<\/strong>: What is the unit of electrical resistance?<br \/>\n   A. Ampere<br \/>\n   B. Volt<br \/>\n   C. Ohm<br \/>\n   D. Watt<br \/>\n   <strong>Answer<\/strong>: C<br \/>\n   <strong>Explanation<\/strong>: The unit of electrical resistance is the ohm, defined as the resistance between two points of a conductor when a constant potential difference of one volt produces a current of one ampere.<\/p>\n<p>2. <strong>Question<\/strong>: According to Ohm&#8217;s Law, what is the relationship between voltage (V), current (I), and resistance (R)?<br \/>\n   A. V = I + R<br \/>\n   B. V = I * R<br \/>\n   C. V = I \/ R<br \/>\n   D. V = R &#8211; I<br \/>\n   <strong>Answer<\/strong>: B<br \/>\n   <strong>Explanation<\/strong>: Ohm&#8217;s Law states that voltage equals current multiplied by resistance (V = I * R), describing how resistance affects the flow of current in a circuit.<\/p>\n<p>3. <strong>Question<\/strong>: In a series circuit with two resistors of 2 ohms and 4 ohms, what is the total resistance?<br \/>\n   A. 2 ohms<br \/>\n   B. 4 ohms<br \/>\n   C. 6 ohms<br \/>\n   D. 8 ohms<br \/>\n   <strong>Answer<\/strong>: C<br \/>\n   <strong>Explanation<\/strong>: In a series circuit, total resistance is the sum of individual resistances, so 2 ohms + 4 ohms = 6 ohms.<\/p>\n<p>4. <strong>Question<\/strong>: In a parallel circuit with two resistors of 2 ohms and 4 ohms, what is the total resistance?<br \/>\n   A. 1.33 ohms<br \/>\n   B. 2 ohms<br \/>\n   C. 4 ohms<br \/>\n   D. 6 ohms<br \/>\n   <strong>Answer<\/strong>: A<br \/>\n   <strong>Explanation<\/strong>: For parallel resistors, total resistance is calculated as 1\/R_total = 1\/2 + 1\/4 = 0.75, so R_total = 1 \/ 0.75 = 1.33 ohms.<\/p>\n<p>5. <strong>Question<\/strong>: What does the first color band on a resistor represent?<br \/>\n   A. Multiplier<br \/>\n   B. Tolerance<br \/>\n   C. First digit<br \/>\n   D. Temperature coefficient<br \/>\n   <strong>Answer<\/strong>: C<br \/>\n   <strong>Explanation<\/strong>: The first color band on a resistor represents the first significant digit of its resistance value.<\/p>\n<p>6. <strong>Question<\/strong>: If a 5 ohm resistor carries a current of 2 amperes, what is the voltage across it?<br \/>\n   A. 2.5 volts<br \/>\n   B. 5 volts<br \/>\n   C. 7 volts<br \/>\n   D. 10 volts<br \/>\n   <strong>Answer<\/strong>: D<br \/>\n   <strong>Explanation<\/strong>: Using Ohm&#8217;s Law, V = I * R = 2 amperes * 5 ohms = 10 volts.<\/p>\n<p>7. <strong>Question<\/strong>: What is the power dissipated by a 10 ohm resistor with 5 volts across it?<br \/>\n   A. 0.5 watts<br \/>\n   B. 2.5 watts<br \/>\n   C. 5 watts<br \/>\n   D. 10 watts<br \/>\n   <strong>Answer<\/strong>: B<br \/>\n   <strong>Explanation<\/strong>: Power is calculated as P = V^2 \/ R = (5 volts)^2 \/ 10 ohms = 25 \/ 10 = 2.5 watts.<\/p>\n<p>8. <strong>Question<\/strong>: In a series circuit, how does adding more resistors affect the total current?<br \/>\n   A. Increases it<br \/>\n   B. Decreases it<br \/>\n   C. Keeps it the same<br \/>\n   D. Doubles it<br \/>\n   <strong>Answer<\/strong>: B<br \/>\n   <strong>Explanation<\/strong>: In a series circuit, total resistance increases with more resistors, which decreases the total current for a fixed voltage, as per Ohm&#8217;s Law.<\/p>\n<p>9. <strong>Question<\/strong>: What is the equivalent resistance of three 6 ohm resistors in parallel?<br \/>\n   A. 2 ohms<br \/>\n   B. 6 ohms<br \/>\n   C. 12 ohms<br \/>\n   D. 18 ohms<br \/>\n   <strong>Answer<\/strong>: A<br \/>\n   <strong>Explanation<\/strong>: For three identical resistors in parallel, 1\/R_total = 1\/6 + 1\/6 + 1\/6 = 3\/6 = 0.5, so R_total = 1 \/ 0.5 = 2 ohms.<\/p>\n<p>10. <strong>Question<\/strong>: A resistor has color bands: brown, black, red, and gold. What is its resistance?<br \/>\n    A. 10 ohms<br \/>\n    B. 100 ohms<br \/>\n    C. 1,000 ohms<br \/>\n    D. 10,000 ohms<br \/>\n    <strong>Answer<\/strong>: C<br \/>\n    <strong>Explanation<\/strong>: Brown (1), black (0), red (multiplier of 100), so resistance is 10 * 100 = 1,000 ohms, with gold indicating 5% tolerance.<\/p>\n<p>11. <strong>Question<\/strong>: What happens to the current in a parallel circuit if one resistor fails open?<br \/>\n    A. Current increases<br \/>\n    B. Current decreases in that branch only<br \/>\n    C. Total current remains the same<br \/>\n    D. Total current stops<br \/>\n    <strong>Answer<\/strong>: B<br \/>\n    <strong>Explanation<\/strong>: In a parallel circuit, if one resistor fails open, current stops in that branch, but the other branches continue to operate normally.<\/p>\n<p>12. <strong>Question<\/strong>: For a voltage divider with two 1k ohm resistors in series, what is the output voltage if input is 10 volts?<br \/>\n    A. 2.5 volts<br \/>\n    B. 5 volts<br \/>\n    C. 7.5 volts<br \/>\n    D. 10 volts<br \/>\n    <strong>Answer<\/strong>: B<br \/>\n    <strong>Explanation<\/strong>: The voltage divides equally, so output across the second resistor is 10 volts \/ 2 = 5 volts.<\/p>\n<p>13. <strong>Question<\/strong>: What is the tolerance of a resistor with a silver band?<br \/>\n    A. 1%<br \/>\n    B. 5%<br \/>\n    C. 10%<br \/>\n    D. 20%<br \/>\n    <strong>Answer<\/strong>: C<br \/>\n    <strong>Explanation<\/strong>: A silver band indicates a tolerance of 10%, meaning the actual resistance can vary by \u00b110% from the stated value.<\/p>\n<p>14. <strong>Question<\/strong>: In a circuit with 12 volts and two resistors (3 ohms and 6 ohms) in series, what is the voltage across the 6 ohm resistor?<br \/>\n    A. 4 volts<br \/>\n    B. 6 volts<br \/>\n    C. 8 volts<br \/>\n    D. 12 volts<br \/>\n    <strong>Answer<\/strong>: C<br \/>\n    <strong>Explanation<\/strong>: Total resistance is 9 ohms. Current is 12V \/ 9 ohms = 1.33A. Voltage across 6 ohms is 1.33A * 6 ohms = 8 volts.<\/p>\n<p>15. <strong>Question<\/strong>: What type of resistor changes value based on light exposure?<br \/>\n    A. Thermistor<br \/>\n    B. Photoresistor<br \/>\n    C. Variable resistor<br \/>\n    D. Carbon resistor<br \/>\n    <strong>Answer<\/strong>: B<br \/>\n    <strong>Explanation<\/strong>: A photoresistor, or LDR, varies its resistance based on the intensity of light falling on it.<\/p>\n<p>16. <strong>Question<\/strong>: If two resistors of 4 ohms each are in parallel, what is their equivalent resistance?<br \/>\n    A. 2 ohms<br \/>\n    B. 4 ohms<br \/>\n    C. 8 ohms<br \/>\n    D. 16 ohms<br \/>\n    <strong>Answer<\/strong>: A<br \/>\n    <strong>Explanation<\/strong>: For two identical resistors in parallel, R_total = R\/2 = 4 ohms \/ 2 = 2 ohms.<\/p>\n<p>17. <strong>Question<\/strong>: What is the current through a 2 ohm resistor if the power dissipated is 8 watts?<br \/>\n    A. 2 amperes<br \/>\n    B. 4 amperes<br \/>\n    C. 6 amperes<br \/>\n    D. 8 amperes<br \/>\n    <strong>Answer<\/strong>: A<br \/>\n    <strong>Explanation<\/strong>: Power is P = I^2 * R, so 8 = I^2 * 2. Solving for I, I^2 = 4, so I = 2 amperes.<\/p>\n<p>18. <strong>Question<\/strong>: In Kirchhoff&#8217;s Voltage Law, what is the sum of voltages around a closed loop?<br \/>\n    A. Zero<br \/>\n    B. Equal to current<br \/>\n    C. Equal to resistance<br \/>\n    D. Positive<br \/>\n    <strong>Answer<\/strong>: A<br \/>\n    <strong>Explanation<\/strong>: Kirchhoff&#8217;s Voltage Law states that the algebraic sum of all voltages around any closed loop in a circuit is zero.<\/p>\n<p>19. <strong>Question<\/strong>: What is the resistance of a wire that has a voltage of 6 volts and carries 3 amperes?<br \/>\n    A. 0.5 ohms<br \/>\n    B. 1 ohm<br \/>\n    C. 2 ohms<br \/>\n    D. 3 ohms<br \/>\n    <strong>Answer<\/strong>: C<br \/>\n    <strong>Explanation<\/strong>: Using Ohm&#8217;s Law, R = V \/ I = 6 volts \/ 3 amperes = 2 ohms.<\/p>\n<p>20. <strong>Question<\/strong>: A Wheatstone bridge is balanced when the ratio of resistances in one arm equals the ratio in the other. What is the condition for balance?<br \/>\n    A. R1\/R2 = R3\/R4<br \/>\n    B. R1 + R2 = R3 + R4<br \/>\n    C. R1 * R2 = R3 * R4<br \/>\n    D. R1 &#8211; R2 = R3 &#8211; R4<br \/>\n    <strong>Answer<\/strong>: A<br \/>\n    <strong>Explanation<\/strong>: For a Wheatstone bridge to be balanced, the condition is R1\/R2 = R3\/R4, resulting in zero current through the galvanometer.<\/p>\n<\/div>\n<p><button id=\"copyquestionsBtn\" type=\"button\" onclick=\"myFunction()\">Copy Quiz Questions<\/button>\u00a0\u00a0or\u00a0\u00a0<button id=\"genquestionsBtn\" class=\"genbtnstyle\" type=\"button\" onclick=\"myFunction1()\">Generate Questions using AI<\/button><\/p>\n<h3 id=\"3\">Part 3: OnlineExamMaker AI Question Generator: Generate questions for any topic<\/h3>\n<div class=\"embed_video_blog\">\n<div class=\"embed-responsive embed-responsive-16by9\" style=\"margin-bottom:16px;\">\n <iframe class=\"embed-responsive-item\" src=\"https:\/\/www.youtube.com\/embed\/zlqho9igH2Y\"><\/iframe>\n<\/div>\n<\/div>\n<div class=\"getstarted-container\">\n<p style=\"margin-bottom: 13px;\">Automatically generate questions using AI<\/p>\n<div class=\"blog_double_btn clearfix\">\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/features\/ai-question-generator.html?refer=download_questions\" target=\"_blank\" rel=\"noopener\">Try AI Question Generator<\/a><\/div>\n<div class=\"p-style-b\">Generate questions for any topic<\/div>\n<\/div>\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/sign-up.html?refer=blog_btn\"> Create A Quiz<\/a><\/div>\n<div class=\"p-style-b\">100% free forever<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><script src=\"https:\/\/unpkg.com\/@popperjs\/core@2\"><\/script><br \/>\n<script src=\"https:\/\/unpkg.com\/tippy.js@6\"><\/script><\/p>\n<p><script type=\"text\/javascript\">\nfunction myFunction() {\nvar copyText = document.getElementById(\"copy_questions\");console.log(copyText.innerText);navigator.clipboard.writeText(copyText.innerText);\n}\nfunction myFunction1() {\n\u00a0  \u00a0 \u00a0 window.open(\"https:\/\/onlineexammaker.com\/features\/ai-question-generator.html\");\n\u00a0 }\nvar copy1, copy2;\n        tippy('#copyquestionsBtn', {\n        'content': \"Copy questions to clipboard\",\n       trigger: 'mouseenter',\n       'onCreate':function(instance){\n              copy1 = instance;\n       },\n       'onTrigger' : function(instance, event) {\n              copy2.hide();\n       }\n       });\n       tippy('#copyquestionsBtn', {\n       'content': \"Copied successfully\",\n       trigger: 'click',\n       'onCreate':function(instance){\n              copy2 = instance;\n       },\n       'onTrigger' : function(instance, event) {\n              copy1.hide();\n       }\n       });\ntippy('#genquestionsBtn', {\n        'content': \"Generate questions using AI for free\",\n         trigger: 'mouseenter'\n       });\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>An electric resistor is a fundamental passive electrical component that opposes the flow of current in a circuit, thereby controlling voltage and current levels. It functions based on Ohm&#8217;s Law, where resistance (R) is measured in ohms (\u03a9), and the relationship is given by V = I \u00d7 R, with voltage (V) in volts and [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":68366,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[353],"tags":[],"class_list":["post-68621","post","type-post","status-publish","format-standard","hentry","category-questions-answers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>20 Electric Resistor Quiz Questions and Answers - OnlineExamMaker Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/onlineexammaker.com\/kb\/20-electric-resistor-quiz-questions-and-answers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"20 Electric Resistor Quiz Questions and Answers - OnlineExamMaker Blog\" \/>\n<meta property=\"og:description\" content=\"An electric resistor is a fundamental passive electrical component that opposes the flow of current in a circuit, thereby controlling voltage and current levels. 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