{"id":639,"date":"2021-04-20T12:35:23","date_gmt":"2021-04-20T10:35:23","guid":{"rendered":"https:\/\/mxth.dk\/?p=639"},"modified":"2021-04-20T13:14:38","modified_gmt":"2021-04-20T11:14:38","slug":"energien-i-en-kapacitor","status":"publish","type":"post","link":"https:\/\/mxth.dk\/?p=639","title":{"rendered":"Energien i en kapacitor"},"content":{"rendered":"\n<div class=\"wp-block-kadence-accordion alignnone\"><div class=\"kt-accordion-wrap kt-accordion-wrap kt-accordion-id_015eea-b5 kt-accordion-has-6-panes kt-active-pane-0 kt-accordion-block kt-pane-header-alignment-left kt-accodion-icon-style-basic kt-accodion-icon-side-right\" style=\"max-width:none\"><div class=\"kt-accordion-inner-wrap\" data-allow-multiple-open=\"false\" data-start-open=\"0\">\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-1 kt-pane_586af9-1d\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\">Energien i en kapacitor<\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\">\n<p>Disse opgaver omhandler energien i en kapacitor<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-6 kt-pane_5294d4-c7\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\">Opgave 1<\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\">\n<p>(a) En 3.00-\u03bcF kapacitor er forbundet til et 12.0 V batteri. Hvor meget energi er der gemt i kapacitoren?<\/p>\n\n\n\n<p>(b) Hvis kapacitoren havde v\u00e6ret forbundet til et 6.00 V batteri, hvor meget energi ville den s\u00e5 kunne have opbevaret?<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-4 kt-pane_c783da-62\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\">Opgave 2<\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\">\n<p>N\u00e5r en person bev\u00e6ger sig omkring i t\u00f8rre omgivelser opsamles der elektriske ladninger p\u00e5 kroppen. N\u00e5r ladningerne er ved h\u00f8j sp\u00e6nding, enten positive eller negative, kan kroppen aflades via nogle gange gnister og st\u00f8d. Antag at kroppen er godt isoleret fra jorden, med en typisk kapacitans p\u00e5 150 \u03bcF.<\/p>\n\n\n\n<p>(a) Hvilken ladning p\u00e5 kroppen vil producere en sp\u00e6nding p\u00e5 10.0 kV?<\/p>\n\n\n\n<p>(b) Sensitive elektroniske apparater kan blive \u00f8delagte af elektrostatisk afladning fra en person. Et specifikt apparat kan blive \u00f8delagt af en afladning der frigiver en energi p\u00e5 250 \u03bcJ. Hvilken sp\u00e6ndingsforskel skal der v\u00e6re p\u00e5 kroppen for at svare den denne energi?<\/p>\n<\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-kadence-pane kt-accordion-pane kt-accordion-pane-5 kt-pane_4047dc-bb\"><div class=\"kt-accordion-header-wrap\"><button class=\"kt-blocks-accordion-header kt-acccordion-button-label-show\"><span class=\"kt-blocks-accordion-title-wrap\"><span class=\"kt-blocks-accordion-title\">Opgave 3<\/span><\/span><span class=\"kt-blocks-accordion-icon-trigger\"><\/span><\/button><\/div><div class=\"kt-accordion-panel kt-accordion-panel-hidden\"><div class=\"kt-accordion-panel-inner\">\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large is-resized\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/mxth.dk\/wp-content\/uploads\/2021\/04\/HeartsineAED-trans-e1435197398383-1.png?resize=384%2C357&#038;ssl=1\" alt=\"\" class=\"wp-image-648\" width=\"384\" height=\"357\" srcset=\"https:\/\/i0.wp.com\/mxth.dk\/wp-content\/uploads\/2021\/04\/HeartsineAED-trans-e1435197398383-1.png?w=768&amp;ssl=1 768w, https:\/\/i0.wp.com\/mxth.dk\/wp-content\/uploads\/2021\/04\/HeartsineAED-trans-e1435197398383-1.png?resize=300%2C279&amp;ssl=1 300w\" sizes=\"auto, (max-width: 384px) 100vw, 384px\" \/><\/figure><\/div>\n\n\n\n<p>The immediate cause of many deaths is ventricular fibrillation, uncoordinated quivering of the heart as opposed to proper beating. An electric shock to the chest can cause momentary paralysis of the heart muscle. after which the heart will sometimes start organized beating again. A <em>defibrillator<\/em> is a devise that applies a strong electric shock to the chest over a time interval of a few milliseconds. <\/p>\n\n\n\n<p>The devise contains a capacitor of several millifarad, charged to several thousand volts. Electrodes called paddles, about 8 cm across and coated with a conducting paste, are held against the chest on both sides of the heart. Their handles are insulated to prevent injury to the operator, who calls, &#8220;Clear&#8221; and pushes a button on one of paddle to discharge the capacitor through the patient&#8217;s chest. Assume an energy of 300 J is to be delivered from a 30.0-\u03bcF capacitor. To what potential difference must it be charged? <\/p>\n<\/div><\/div><\/div>\n<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ub_ctt_via":"","editor_plus_copied_stylings":"{}","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2,4],"tags":[],"class_list":["post-639","post","type-post","status-publish","format-standard","hentry","category-fysik","category-opgave"],"featured_image_src":null,"author_info":{"display_name":"Henriksen","author_link":"https:\/\/mxth.dk\/?author=1"},"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/posts\/639","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=639"}],"version-history":[{"count":10,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/posts\/639\/revisions"}],"predecessor-version":[{"id":652,"href":"https:\/\/mxth.dk\/index.php?rest_route=\/wp\/v2\/posts\/639\/revisions\/652"}],"wp:attachment":[{"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=639"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=639"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mxth.dk\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}