{"id":19008,"date":"2024-04-15T05:33:40","date_gmt":"2024-04-15T05:33:40","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=19008"},"modified":"2024-04-15T05:33:40","modified_gmt":"2024-04-15T05:33:40","slug":"a-zener-regulator-has-an-input-voltage-from-15-to-20-v-and-a-load-current-from-5-to-20-ma-if-the-zener-voltage-is-6-8-v-what-value-should-the-series-resistor-have-a-310-ohm-b-400-ohm-c-410-ohm-d","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/a-zener-regulator-has-an-input-voltage-from-15-to-20-v-and-a-load-current-from-5-to-20-ma-if-the-zener-voltage-is-6-8-v-what-value-should-the-series-resistor-have-a-310-ohm-b-400-ohm-c-410-ohm-d\/","title":{"rendered":"A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have? A. 310 Ohm B. 400 Ohm C. 410 Ohm D. 550 Ohm E. None of the above"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6abc0821186e9\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    If the zener voltage is 6.8 V, what value should the series resistor have? A. 310 Ohm                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    400 Ohm                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"true\">\r\n                    410 Ohm                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    550 Ohm E. None of the above                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is $\\boxed{\\text{A. 310 Ohm}}$.<\/p>\n<p>The zener voltage is the voltage that the zener diode will regulate the output voltage to. In this case, the zener voltage is 6.8 V. The load current is the current that the load will draw from the output of the zener regulator. In this case, the load current is 5 to 20 mA.<\/p>\n<p>The series resistor is used to limit the current that flows through the zener diode. The value of the series resistor is calculated using the following formula:<\/p>\n<p>$$R = \\dfrac{(V_{IN} &#8211; V_{Z})}{I}$$<\/p>\n<p>where:<\/p>\n<ul>\n<li>$R$ is the value of the series resistor in ohms<\/li>\n<li>$V_{IN}$ is the input voltage in volts<\/li>\n<li>$V_{Z}$ is the zener voltage in volts<\/li>\n<li>$I$ is the load current in amps<\/li>\n<\/ul>\n<p>In this case, the input voltage is 15 to 20 V, the zener voltage is 6.8 V, and the load current is 5 to 20 mA. Substituting these values into the formula, we get:<\/p>\n<p>$$R = \\dfrac{(15 V &#8211; 6.8 V)}{5 mA} = 310 \\Omega$$<\/p>\n<p>Therefore, <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n     <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div>    <\/a>\r\n    <\/div> the value of the series resistor should be 310 ohms.<\/p>\n<p>Option A is the correct answer because it is the only option that is within the range of values that are typically used for zener regulators. Option B is too high, option C is too low, option D is too high, and option E is not a valid option.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[682],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>A zener regulator has an input voltage from 15 to 20 V and a load current from 5 to 20 mA. If the zener voltage is 6.8 V, what value should the series resistor have? A. 310 Ohm B. 400 Ohm C. 410 Ohm D. 550 Ohm E. 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