{"id":89317,"date":"2022-02-14T19:53:17","date_gmt":"2022-02-14T14:23:17","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=89317"},"modified":"2025-02-05T12:01:47","modified_gmt":"2025-02-05T06:31:47","slug":"to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/","title":{"rendered":"To Measure Resistance, Voltage (AC\/DC), Current (AC) and Check Continuity of a Given Circuit Using Multimeter"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#Apparatus_Required\" title=\"Apparatus Required\">Apparatus Required<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#Procedure\" title=\"Procedure\">Procedure<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#1_Measuring_Resistance_%CE%A9\" title=\"1. Measuring Resistance (\u03a9)\">1. Measuring Resistance (\u03a9)<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#Steps\" title=\"Steps:\">Steps:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#2_Measuring_Voltage_ACDC\" title=\"2. Measuring Voltage (AC\/DC)\">2. Measuring Voltage (AC\/DC)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#3_Measuring_Current_AC\" title=\"3. Measuring Current (AC)\">3. Measuring Current (AC)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#4_Checking_Continuity\" title=\"4. Checking Continuity\">4. Checking Continuity<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#Precautions\" title=\"Precautions\">Precautions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#Question_and_Answer_on_AC_AND_DC_Current\" title=\"Question and Answer on AC AND DC Current\">Question and Answer on AC AND DC Current<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#Viva_Questions_and_Answers\" title=\"Viva Questions and Answers\">Viva Questions and Answers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/infinitylearn.com\/surge\/study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/#Conclusion\" title=\"Conclusion\">Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<p>A multimeter is an electronic measuring device used to measure voltage, current, and resistance in electrical circuits. It is also useful for checking continuity, ensuring a circuit is complete.<\/p>\n<p>There are two types of multimeters:<\/p>\n<ol>\n<li><strong>Analog Multimeter<\/strong> \u2013 Uses a moving needle to show readings.<\/li>\n<li><strong>Digital Multimeter (DMM)<\/strong> \u2013 Displays readings on a screen.<\/li>\n<\/ol>\n<p>In this experiment, we will learn how to use a multimeter to measure resistance, AC\/DC voltage, AC current, and continuity.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Apparatus_Required\"><\/span>Apparatus Required<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Digital Multimeter<\/li>\n<li>Connecting Probes (Red &amp; Black Wires)<\/li>\n<li>Resistors, Wires, and an Electrical Circuit<\/li>\n<li>AC\/DC Power Supply or Battery<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Procedure\"><\/span>Procedure<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Measuring_Resistance_%CE%A9\"><\/span>1. Measuring Resistance (\u03a9)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/infinitylearn.com\/surge\/formulas\/resistance-formula\"><strong>Resistance<\/strong><\/a> is the opposition to the flow of electric current and is measured in <a href=\"https:\/\/infinitylearn.com\/surge\/formulas\/ohms-law-formula\/\"><strong>Ohms (\u03a9)<\/strong><\/a>.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Steps\"><\/span><strong>Steps:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li>Turn the multimeter dial to the \u03a9 (Ohm) symbol.<\/li>\n<li>Disconnect power from the circuit.<\/li>\n<li>Insert probes:\n<ul>\n<li>Red probe \u2192 V\/\u03a9 port<\/li>\n<li>Black probe \u2192 COM port<\/li>\n<\/ul>\n<\/li>\n<li>Touch the probes to both ends of the resistor\/component.<\/li>\n<li>Read the resistance value on the display.<\/li>\n<\/ol>\n<p><strong>Observations:<\/strong><\/p>\n<ul>\n<li>If the display shows 0 \u03a9, the component has no resistance.<\/li>\n<li>If the display shows infinity (OL), the component is broken or open circuit.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"2_Measuring_Voltage_ACDC\"><\/span>2. Measuring Voltage (AC\/DC)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Voltage<\/strong> is the electrical potential difference across a component, measured in <strong>Volts (V)<\/strong>.<\/p>\n<p><strong>(a) Measuring DC Voltage (Battery, Power Supply)<\/strong><\/p>\n<ol>\n<li>Set the dial to DCV (Direct Current Voltage) symbol (V with a straight line and dots).<\/li>\n<li>Insert probes:\n<ul>\n<li>Red probe \u2192 V\/\u03a9 port<\/li>\n<li>Black probe \u2192 COM port<\/li>\n<\/ul>\n<\/li>\n<li>Touch the red probe to the positive (+) terminal and black probe to the negative (-) terminal.<\/li>\n<li>Read the voltage value on the screen.<\/li>\n<\/ol>\n<p><strong>(b) Measuring AC Voltage (Home Electric Supply)<\/strong><\/p>\n<ol>\n<li>Set the dial to ACV (Alternating Current Voltage) symbol (V with a wavy line ~).<\/li>\n<li>Insert probes:\n<ul>\n<li>Red probe \u2192 V\/\u03a9 port<\/li>\n<li>Black probe \u2192 COM port<\/li>\n<\/ul>\n<\/li>\n<li>Touch the probes to both terminals of the power source.<\/li>\n<li>Read the voltage value displayed.<\/li>\n<\/ol>\n<p><strong>Observations:<\/strong><\/p>\n<ul>\n<li><strong>For DC<\/strong>, polarity matters (positive and negative).<\/li>\n<li><strong>For AC<\/strong>, polarity doesn\u2019t matter.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"3_Measuring_Current_AC\"><\/span>3. Measuring Current (AC)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Current<\/strong> is the flow of electric charge in a circuit, measured in <strong>Amperes (A)<\/strong>.<\/p>\n<p><strong>Steps:<\/strong><\/p>\n<ol>\n<li>Set the dial to ACA (Amperes AC, marked as A~).<\/li>\n<li>Insert probes:\n<ul>\n<li>Red probe \u2192 A or mA port (depends on current range).<\/li>\n<li>Black probe \u2192 COM port<\/li>\n<\/ul>\n<\/li>\n<li>Break the circuit and connect the multimeter in series (not parallel like voltage measurement).<\/li>\n<li>Turn on the power and note the reading.<\/li>\n<\/ol>\n<p><strong>Observations:<\/strong><\/p>\n<ul>\n<li>If the display shows <strong>0 A<\/strong>, there is <strong>no current flow<\/strong>.<\/li>\n<li>If the display shows a <strong>high value<\/strong>, check circuit connections.<\/li>\n<\/ul>\n<p><strong>Caution:<\/strong> Never measure <strong>AC current directly from the wall socket<\/strong>, as it can damage the multimeter and cause injury.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Checking_Continuity\"><\/span>4. Checking Continuity<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Continuity<\/strong> is used to check if a circuit is complete and unbroken.<\/p>\n<p><strong>Steps:<\/strong><\/p>\n<ol>\n<li>Set the dial to the continuity mode (\ud83d\udd0a or diode symbol).<\/li>\n<li>Insert probes:\n<ul>\n<li>Red probe \u2192 V\/\u03a9 port<\/li>\n<li>Black probe \u2192 COM port<\/li>\n<\/ul>\n<\/li>\n<li>Touch both probes to the two points you want to test.<\/li>\n<li>If the circuit is complete, the multimeter beeps.<\/li>\n<li>If no beep is heard, the circuit is broken.<\/li>\n<\/ol>\n<p><strong>Observations:<\/strong><\/p>\n<ul>\n<li><strong>Beep sound \u2192 Circuit is complete.<\/strong><\/li>\n<li><strong>No sound \u2192 Open circuit or broken wire.<\/strong><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Precautions\"><\/span>Precautions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Never measure resistance in a powered circuit.<\/li>\n<li>Use correct measurement ranges (AC\/DC) to prevent damage.<\/li>\n<li>Never connect the probes directly to a high-voltage AC source.<\/li>\n<li>Hold probes properly to avoid electric shock.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Question_and_Answer_on_AC_AND_DC_Current\"><\/span>Question and Answer on AC AND DC Current<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>1. What is a multimeter?<\/strong><\/p>\n<p><strong>Answer: <\/strong>A <strong>multimeter<\/strong> is an electronic measuring instrument used to measure <strong>voltage (V), current (A), and resistance (\u03a9)<\/strong>. It can also be used to <strong>check circuit continuity<\/strong>.<\/p>\n<p><strong>2. How do you measure resistance using a multimeter?<\/strong><\/p>\n<p><strong>Answer:<\/strong><\/p>\n<ol>\n<li><strong>Set the multimeter dial to the \u03a9 (Ohm) mode.<\/strong><\/li>\n<li><strong>Disconnect power from the circuit.<\/strong><\/li>\n<li><strong>Insert probes:<\/strong>\n<ul>\n<li>Red probe \u2192 <strong>V\/\u03a9 port<\/strong><\/li>\n<li>Black probe \u2192 <strong>COM port<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Touch the probes to both ends of the resistor.<\/strong><\/li>\n<li><strong>Read the resistance value<\/strong> on the display.<\/li>\n<\/ol>\n<p><strong>3. What is the unit of resistance?<\/strong><\/p>\n<p><strong>Answer:<\/strong><br \/>\nThe unit of resistance is <strong>Ohm (\u03a9)<\/strong>.<\/p>\n<p><strong>4. How do you measure DC voltage using a multimeter?<\/strong><\/p>\n<p><strong>Answer:<\/strong><\/p>\n<ol>\n<li><strong>Set the dial to DCV (V with a straight line and dots).<\/strong><\/li>\n<li><strong>Insert probes:<\/strong>\n<ul>\n<li>Red probe \u2192 <strong>V\/\u03a9 port<\/strong><\/li>\n<li>Black probe \u2192 <strong>COM port<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Touch the red probe to the positive (+) terminal and the black probe to the negative (-) terminal.<\/strong><\/li>\n<li><strong>Read the voltage value<\/strong> on the screen.<\/li>\n<\/ol>\n<p><strong>5. How do you measure AC voltage using a multimeter?<\/strong><\/p>\n<p><strong>Answer:<\/strong><\/p>\n<ol>\n<li><strong>Set the dial to ACV (V with a wavy line ~).<\/strong><\/li>\n<li><strong>Insert probes:<\/strong>\n<ul>\n<li>Red probe \u2192 <strong>V\/\u03a9 port<\/strong><\/li>\n<li>Black probe \u2192 <strong>COM port<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Touch the probes to the two terminals of the power source.<\/strong><\/li>\n<li><strong>Read the voltage on the screen.<\/strong><\/li>\n<\/ol>\n<p><strong>Caution:<\/strong> Never measure AC voltage from a wall socket without proper safety precautions.<\/p>\n<p><strong>6. Why do we measure voltage in parallel?<\/strong><\/p>\n<p><strong>Answer:<\/strong><br \/>\nVoltage is measured <strong>across<\/strong> a component, so the multimeter is connected <strong>in parallel<\/strong> to check the potential difference between two points.<\/p>\n<p><strong>7. How do you measure AC current using a multimeter?<\/strong><\/p>\n<p><strong>Answer:<\/strong><\/p>\n<ol>\n<li><strong>Set the dial to ACA (A~).<\/strong><\/li>\n<li><strong>Insert probes:<\/strong>\n<ul>\n<li>Red probe \u2192 <strong>A or mA port<\/strong><\/li>\n<li>Black probe \u2192 <strong>COM port<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Break the circuit and connect the multimeter in series<\/strong> with the circuit.<\/li>\n<li><strong>Turn on the power and read the current value.<\/strong><\/li>\n<\/ol>\n<p><strong>Caution:<\/strong> Never measure AC current directly from a power socket.<\/p>\n<p><strong>8. Why is current measured in series and not in parallel?<\/strong><\/p>\n<p><strong>Answer:<\/strong><br \/>\nCurrent flows <strong>through<\/strong> a circuit, so to measure it, the multimeter must be placed <strong>in series<\/strong> to allow the current to pass through it.<\/p>\n<p><strong>9. How do you check continuity using a multimeter?<\/strong><\/p>\n<p><strong>Answer:<\/strong><\/p>\n<ol>\n<li><strong>Set the dial to continuity mode (\ud83d\udd0a or diode symbol \u2192|\u2014).<\/strong><\/li>\n<li><strong>Insert probes:<\/strong>\n<ul>\n<li>Red probe \u2192 <strong>V\/\u03a9 port<\/strong><\/li>\n<li>Black probe \u2192 <strong>COM port<\/strong><\/li>\n<\/ul>\n<\/li>\n<li><strong>Touch both probes to the two points you want to test.<\/strong><\/li>\n<li><strong>If the circuit is complete, the multimeter will beep.<\/strong><\/li>\n<li><strong>If no beep is heard, the circuit is open or broken.<\/strong><\/li>\n<\/ol>\n<p><strong>10. What is the symbol for continuity on a multimeter?<\/strong><\/p>\n<p><strong>Answer:<\/strong><br \/>\nThe <strong>continuity mode<\/strong> is represented by a <strong>diode symbol (\u2192|\u2014)<\/strong> or a <strong>sound wave symbol (\ud83d\udd0a)<\/strong>.<\/p>\n<p><strong>11. What happens if you try to measure resistance in a powered circuit?<\/strong><\/p>\n<p><strong>Answer:<\/strong><br \/>\nThe reading will be incorrect and may damage the multimeter. Always turn <strong>OFF<\/strong> the power before measuring resistance.<\/p>\n<p><strong>12. How do you safely use a multimeter?<\/strong><\/p>\n<p><strong>Answer:<\/strong><\/p>\n<ul>\n<li>Always <strong>set the correct mode<\/strong> before measuring.<\/li>\n<li>Do <strong>not measure resistance in a powered circuit<\/strong>.<\/li>\n<li><strong>Do not measure high AC voltage or current<\/strong> without proper safety precautions.<\/li>\n<li><strong>Hold probes properly<\/strong> to avoid electric shock.<\/li>\n<\/ul>\n<p><strong>13. What happens if you measure AC voltage in DC mode?<\/strong><\/p>\n<p><strong>Answer:<\/strong><br \/>\nThe multimeter may display <strong>0V<\/strong> or show an <strong>incorrect reading<\/strong>.<\/p>\n<p><strong>14. Why should we use the correct range on a multimeter?<\/strong><\/p>\n<p><strong>Answer:<\/strong><br \/>\nUsing the wrong range can give <strong>incorrect readings<\/strong> or even <strong>damage the multimeter<\/strong>.<\/p>\n<p><strong>15. What is the difference between AC and DC voltage?<\/strong><\/p>\n<p><strong>Answer:<\/strong><\/p>\n<ul>\n<li><strong>AC Voltage (Alternating Current)<\/strong> changes direction periodically (e.g., home electricity supply).<\/li>\n<li><strong>DC Voltage (Direct Current)<\/strong> flows in only one direction (e.g., battery voltage).<\/li>\n<\/ul>\n<p><strong>16. What should you do if the multimeter does not show any reading while checking continuity?<\/strong><\/p>\n<p><strong>Answer:<\/strong><\/p>\n<ul>\n<li>Ensure the probes are <strong>properly connected<\/strong>.<\/li>\n<li>Check if the circuit is <strong>open or broken<\/strong>.<\/li>\n<li>Make sure the <strong>multimeter is working correctly<\/strong>.<\/li>\n<\/ul>\n<p><strong>17. What does \u2018OL\u2019 or \u20181\u2019 on the screen mean while measuring resistance?<\/strong><\/p>\n<p><strong>Answer:<\/strong><\/p>\n<ul>\n<li><strong>\u2018OL\u2019 or \u20181\u2019 means \u2018Over Limit\u2019<\/strong>, indicating an <strong>open circuit or infinite resistance<\/strong>.<\/li>\n<\/ul>\n<p><strong>18. What are the main functions of a multimeter?<\/strong><\/p>\n<p><strong>Answer:<\/strong><br \/>\nA multimeter can measure:<\/p>\n<ol>\n<li><strong>Voltage (AC\/DC)<\/strong><\/li>\n<li><strong>Current (AC\/DC)<\/strong><\/li>\n<li><strong>Resistance (\u03a9)<\/strong><\/li>\n<li><strong>Continuity<\/strong><\/li>\n<li><strong>Diode testing<\/strong><\/li>\n<\/ol>\n<p><strong>19. Can a multimeter be used to check batteries?<\/strong><\/p>\n<p><strong>Answer:<\/strong><br \/>\nYes, set the multimeter to <strong>DC voltage mode<\/strong> and measure the voltage of the battery terminals.<\/p>\n<p><strong>20. What should you check before using a multimeter?<\/strong><\/p>\n<p><strong>Answer:<\/strong><\/p>\n<ul>\n<li>The <strong>battery of the multimeter<\/strong> should be working.<\/li>\n<li>The <strong>probes should be properly connected<\/strong>.<\/li>\n<li>The <strong>correct measurement mode<\/strong> should be selected.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Viva_Questions_and_Answers\"><\/span>Viva Questions and Answers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>These are some important viva questions that might be asked during your practical exam.<\/p>\n<p><strong>1. What is a multimeter?<\/strong><\/p>\n<p><strong>Ans:<\/strong> A multimeter is an instrument used to measure voltage, current, and resistance in electrical circuits.<\/p>\n<p><strong>2. How do you measure resistance with a multimeter?<\/strong><\/p>\n<p><strong>Ans:<\/strong> Set the dial to \u03a9 (Ohm), connect probes across the resistor, and read the display.<\/p>\n<p><strong>3. What happens if you measure AC voltage in DC mode?<\/strong><\/p>\n<p><strong>Ans:<\/strong> The multimeter may show <strong>0V<\/strong> or give an <strong>incorrect reading<\/strong>.<\/p>\n<p><strong>4. What is the symbol of continuity on a multimeter?<\/strong><\/p>\n<p><strong>Ans:<\/strong> It is usually represented by a <strong>diode symbol (\u2192|\u2014)<\/strong> or a <strong>sound wave symbol (\ud83d\udd0a)<\/strong>.<\/p>\n<p><strong>5. Why should we measure current in series but voltage in parallel?<\/strong><\/p>\n<p><strong>Ans:<\/strong><\/p>\n<ul>\n<li><strong>Current is measured in series<\/strong> because it flows <strong>through<\/strong> the circuit.<\/li>\n<li><strong>Voltage is measured in parallel<\/strong> as it is the <strong>potential difference<\/strong> between two points.<\/li>\n<\/ul>\n<p><strong>6. What is the unit of resistance?<\/strong><\/p>\n<p><strong>Ans:<\/strong> The unit of resistance is <strong>Ohm (\u03a9)<\/strong>.<\/p>\n<p><strong>7. What is the difference between AC and DC voltage?<\/strong><\/p>\n<p><strong>Ans:<\/strong><\/p>\n<ul>\n<li><strong>AC Voltage (Alternating Current)<\/strong> changes direction periodically.<\/li>\n<li><strong>DC Voltage (Direct Current)<\/strong> flows in one direction only.<\/li>\n<\/ul>\n<p><strong>8. What happens if the circuit is open while checking continuity?<\/strong><\/p>\n<p><strong>Ans:<\/strong> If the circuit is open, the <strong>multimeter will not beep<\/strong>, indicating no continuity.<\/p>\n<p><strong>9. What safety measures should be followed while using a multimeter?<\/strong><\/p>\n<p><strong>Ans:<\/strong><\/p>\n<ul>\n<li><strong>Never connect probes directly to a high-voltage AC source.<\/strong><\/li>\n<li><strong>Always select the correct range before measurement.<\/strong><\/li>\n<li><strong>Do not touch the metal tips while measuring live circuits.<\/strong><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Using a <strong>digital multimeter<\/strong>, we can easily <strong>measure resistance, voltage (AC\/DC), current (AC), and check continuity<\/strong> in a circuit. It is an essential tool for electronics and electrical work, helping in <strong>troubleshooting<\/strong> and <strong>circuit testing<\/strong>.<\/p>\n<p>Mastering these <strong>basic measurements<\/strong> will help in both academic studies and real-world applications in electrical and electronics engineering.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A multimeter is an electronic measuring device used to measure voltage, current, and resistance in electrical circuits. It is also [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Voltage","_yoast_wpseo_title":"To Measure Resistance, Voltage (AC\/DC), Current (AC) and Check Continuity of a Given Circuit Using Multimeter","_yoast_wpseo_metadesc":"Get To Measure Resistance, Voltage (AC\/DC), Current (AC) and Check Continuity of a Given Circuit Using Multimeter on Infinity Learn.","custom_permalink":"study-material\/cbse\/physics\/to-measure-resistance-voltage-ac-dc-current-ac-and-check-continuity-of-a-given-circuit-using-multimeter\/"},"categories":[92,21],"tags":[],"table_tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>To Measure Resistance, Voltage (AC\/DC), Current (AC) and Check Continuity of a Given Circuit Using Multimeter<\/title>\n<meta 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