{"id":19004,"date":"2024-04-15T05:33:37","date_gmt":"2024-04-15T05:33:37","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=19004"},"modified":"2024-04-15T05:33:37","modified_gmt":"2024-04-15T05:33:37","slug":"which-one-of-the-following-phrases-best-describes-residual-magnetism-a-magnetism-that-remains-in-the-core-of-an-electromagnet-after-the-current-through-the-coil-is-turned-off-b-the-force-of-attract","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-phrases-best-describes-residual-magnetism-a-magnetism-that-remains-in-the-core-of-an-electromagnet-after-the-current-through-the-coil-is-turned-off-b-the-force-of-attract\/","title":{"rendered":"Which one of the following phrases best describes residual magnetism? A. Magnetism that remains in the core of an electromagnet after the current through the coil is turned off B. The force of attraction between the poles of a permanent and temporary magnetic field C. The amount of magnetic flux that is not confined to the core material of an electromagnet D. The circular magnetic field that surrounds a conductor carrying a current 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_6abbec76d82e2\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"true\">\r\n                    Magnetism that remains in the core of an electromagnet after the current through the coil is turned off                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    The force of attraction between the poles of a permanent and temporary magnetic field                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    The amount of magnetic flux that is not confined to the core material of an electromagnet                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    The circular magnetic field that surrounds a conductor carrying a current 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 A. Magnetism that remains in the core of an electromagnet after the current through the coil is turned off.<\/p>\n<p>Residual magnetism is the magnetism that remains in a ferromagnetic material after the external magnetic field that caused it has been removed. It is caused by the alignment of the magnetic domains in the material. When a ferromagnetic material is placed in a magnetic field, the domains align with the field. When the field is removed, the domains tend to remain aligned, resulting in residual magnetism.<\/p>\n<p>The amount of residual magnetism <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> depends on the material, the strength of the applied field, and the time the material is exposed to the field. Residual <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> magnetism can be reduced by heating the material or by applying a reverse magnetic field.<\/p>\n<p>Residual magnetism is used in a variety of applications, including electromagnets, loudspeakers, and magnetic recording.<\/p>\n<p>Option B is incorrect because it describes the force of attraction between the poles of a permanent and temporary magnetic field.<\/p>\n<p>Option C is incorrect because it describes the amount of magnetic flux that is not confined to the core material of an electromagnet.<\/p>\n<p>Option D is incorrect because it describes the circular magnetic field that surrounds a conductor carrying a current.<\/p>\n<p>Option E is incorrect because it is not a description of residual magnetism.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Join Our Telegram Channel 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>Which one of the following phrases best describes residual magnetism? 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Magnetism that remains in the core of an electromagnet after the current through the coil is turned off B. The force of attraction between the poles of a permanent and temporary magnetic field C. The amount of magnetic flux that is not confined to the core material of an electromagnet D. The circular magnetic field that surrounds a conductor carrying a current E. 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