{"id":55700,"date":"2024-04-16T00:31:52","date_gmt":"2024-04-16T00:31:52","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=55700"},"modified":"2024-04-16T00:31:52","modified_gmt":"2024-04-16T00:31:52","slug":"dielectric-strength-of-medium","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/dielectric-strength-of-medium\/","title":{"rendered":"Dielectric strength of medium"},"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_6a974b3466f51\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    increases with rise in temperature                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    increases with moisture content                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    is same for all insulating materials                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"true\">\r\n                    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: <strong>D. none of the above<\/strong><\/p>\n<p>Dielectric strength is the maximum electric field strength that an insulating material can withstand <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        <\/a>\r\n    <\/div> without breaking down and becoming conductive. It is usually measured in volts per meter (V\/m).<\/p>\n<p>The dielectric strength of a material is affected by a number of factors, including temperature, moisture content, and the presence of impurities. In general, dielectric strength decreases with increasing temperature and moisture content. The presence of impurities can also reduce dielectric strength.<\/p>\n<p>The dielectric strength of a material is an important property that is used in the design of electrical equipment. For example, the insulation used in high-voltage cables must have a high dielectric strength to prevent breakdown and arcing.<\/p>\n<p>Here are some additional details about each of the options:<\/p>\n<ul>\n<li><strong>A. increases with rise in temperature<\/strong><\/li>\n<\/ul>\n<p>This is not always the case. In fact, the dielectric strength of some materials decreases with increasing temperature. For example, the dielectric strength of paper decreases by about 50% for every 10\u00c2\u00b0C increase in temperature.<\/p>\n<ul>\n<li><strong>B. increases with moisture content<\/strong><\/li>\n<\/ul>\n<p>This is also not always the case. In fact, the dielectric strength of some materials decreases with increasing moisture content. For example, the dielectric strength of paper decreases by about 20% for every 1% increase in moisture content.<\/p>\n<ul>\n<li><strong>C. is same for all insulating materials<\/strong><\/li>\n<\/ul>\n<p>This is definitely not the case. The dielectric strength of different materials can vary widely. For example, <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> the dielectric strength of air is about 100,000 V\/m, while the dielectric strength of mica is about 10,000,000 V\/m.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Subscribe on 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