{"id":6842,"date":"2015-06-16T13:41:51","date_gmt":"2015-06-16T11:41:51","guid":{"rendered":"https:\/\/kamerpower.com\/?p=6842"},"modified":"2015-06-16T13:44:26","modified_gmt":"2015-06-16T11:44:26","slug":"epreuve-concours-ensp-yaounde-physique-et-chimie-cameroun-4-concours-dentree","status":"publish","type":"post","link":"https:\/\/kamerpower.com\/fr\/epreuve-concours-ensp-yaounde-physique-et-chimie-cameroun-4-concours-dentree\/","title":{"rendered":"Epreuve Concours ENSP Yaounde Physique et Chimie Cameroun 4 concours d&#8217;entr\u00e9e \u00e0 l\u2019Ecole Nationale Sup\u00e9rieure Polytechnique"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69dbef642c4a0\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"ez-toc-cssicon\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #000000;color:#000000\" 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: #000000;color:#000000\" 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><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69dbef642c4a0\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/kamerpower.com\/fr\/epreuve-concours-ensp-yaounde-physique-et-chimie-cameroun-4-concours-dentree\/#epreuve-concours-ensp-yaounde-physique-et-chimie-4\" >Epreuve Concours ENSP Yaounde Physique et Chimie\u00a04<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kamerpower.com\/fr\/epreuve-concours-ensp-yaounde-physique-et-chimie-cameroun-4-concours-dentree\/#kamerpower-probleme-1\" >Kamerpower Probl\u00e8me\u00a01<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kamerpower.com\/fr\/epreuve-concours-ensp-yaounde-physique-et-chimie-cameroun-4-concours-dentree\/#kamerpower-probleme-2\" >Kamerpower Probl\u00e8me\u00a02<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kamerpower.com\/fr\/epreuve-concours-ensp-yaounde-physique-et-chimie-cameroun-4-concours-dentree\/#epreuve-concours-ensp-yaounde-physique-et-chimie-cameroun-4-concours-dentree-a-lecole-nationale-superieure-polytechnique\" >Epreuve Concours ENSP Yaounde\u00a0Physique et Chimie Cameroun 4 concours d&#8217;entr\u00e9e \u00e0 l\u2019Ecole Nationale Sup\u00e9rieure Polytechnique<\/a><\/li><\/ul><\/nav><\/div>\n<h3 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"epreuve-concours-ensp-yaounde-physique-et-chimie-4\"><\/span><span style=\"color: #000000;\"><strong><a style=\"color: #000000;\" href=\"https:\/\/kamerpower.com\/fr\/epreuves-concours-polytechnique-cameroun-pdf\/\" target=\"_blank\">Epreuve Concours ENSP Yaounde Physique et Chimie<\/a>\u00a04<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: center;\"><span style=\"color: #000000;\">Ecole Nationale Superieure Polytechnique<br \/>\n(\u00c9preuve\u00a0de Chimie et Physique ENSP Yaounde)<\/span><br \/>\n<span style=\"color: #008000; text-shadow: 2px 0 2px #000;\">KA<\/span><span style=\"color: #ff0000; text-shadow: 2px 0 2px #000;\">M<\/span><span style=\"color: #ffcc00; text-shadow: 2px 0 2px #000;\">ER<\/span><span style=\"color: #800080; text-shadow: 2px 0 2px #000;\">POWER<\/span><span style=\"color: #3366ff; text-shadow: 2px 0 2px #000;\">.COM<\/span><\/p>\n<h3 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"kamerpower-probleme-1\"><\/span><span style=\"color: #3366ff;\">Kamerpower Probl\u00e8me\u00a01<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\">\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<span style=\"color: #000000;\">\u00a0\u00a0\u00a0\u00a0\u00a0 Un avion dont l\u2019h\u00e9lice a <span style=\"color: #ff0000;\">2 m<\/span> de diam\u00e8tre avance sur une piste \u00e0 la vitesse de <span style=\"color: #ff0000;\">280km\/h<\/span>, alors que son h\u00e9lice tourne \u00e0 une vitesse de <span style=\"color: #ff0000;\">3000trs\/min<\/span>. <a style=\"color: #000000;\" href=\"https:\/\/kamerpower.com\/fr\/\">Quel<\/a> est le module de la vitesse de l\u2019extr\u00e9mit\u00e9 d\u2019une pale d\u2019h\u00e9lice par rapport \u00e0 un observateur fixe au sol\u00a0? kamerpower.com<\/span><\/p>\n<hr \/>\n<h3 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"kamerpower-probleme-2\"><\/span><span style=\"color: #3366ff;\">Kamerpower Probl\u00e8me\u00a02<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">Un circuit est constitu\u00e9 d\u2019une r\u00e9sistance, d\u2019une bobine et d\u2019un condensateur tel qu\u2019indiqu\u00e9 sur la figure.<\/span><\/p>\n<ol style=\"text-align: justify;\">\n<li><span style=\"color: #000000;\">Calculer les courants <span style=\"color: #ff0000;\">I<sub>1<\/sub>, I<sub>2<\/sub>, I<sub>3<\/sub><\/span> en r\u00e9gime permanent.<\/span><\/li>\n<li><span style=\"color: #000000;\">On remplace E par un g\u00e9n\u00e9rateur de f.e.m sinuso\u00efdale de valeur efficace <span style=\"color: #ff0000;\">100V<\/span> et de pulsation <span style=\"color: #ff0000;\">360 rad\/s<\/span>. reprendre le calcul de<span style=\"color: #ff0000;\"> I<sub>1<\/sub><\/span>.<\/span><\/li>\n<li><span style=\"color: #000000;\">Quel est le d\u00e9phasage entre <span style=\"color: #ff0000;\">I<sub>1<\/sub><\/span> et la tension du g\u00e9n\u00e9rateur\u00a0? Pr\u00e9ciser si le courant est en avance ou en retard.<\/span><\/li>\n<li><span style=\"color: #000000;\">Quelle puissance (active) fournit le g\u00e9n\u00e9rateur\u00a0?\u00a0kamerpower.com<\/span><\/li>\n<li><span style=\"color: #000000;\">Pour une valeur <span style=\"color: #ff0000;\"><em>f<\/em><sub>0<\/sub><\/span> de la fr\u00e9quence, le courant <span style=\"color: #ff0000;\">I<sub>1<\/sub><\/span> et la tension du g\u00e9n\u00e9rateur sont en phase calculer<span style=\"color: #ff0000;\"> <em>f<\/em><sub>0<\/sub><\/span>.<\/span><\/li>\n<\/ol>\n<div id=\"attachment_4581\" style=\"width: 471px\" class=\"wp-caption aligncenter\"><img decoding=\"async\" aria-describedby=\"caption-attachment-4581\" class=\"wp-image-4581 size-full\" src=\"https:\/\/kamerpower.com\/wp-content\/uploads\/2015\/04\/une-inductance-de-r\u00e9sistance-interne-Kamerpowers.png\" alt=\"ENSP une inductance de r\u00e9sistance interne\" width=\"461\" height=\"231\" \/><p id=\"caption-attachment-4581\" class=\"wp-caption-text\"><span style=\"color: #000000;\">ENSP Kamerpower.com une inductance de r\u00e9sistance interne<\/span><\/p><\/div>\n<hr \/>\n<p>&nbsp;<\/p>\n<h2 style=\"text-align: center;\"><span class=\"ez-toc-section\" id=\"epreuve-concours-ensp-yaounde-physique-et-chimie-cameroun-4-concours-dentree-a-lecole-nationale-superieure-polytechnique\"><\/span><span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" href=\"https:\/\/kamerpower.com\/fr\/epreuves-concours-polytechnique-cameroun-pdf\/\" target=\"_blank\">Epreuve Concours ENSP Yaounde\u00a0Physique et Chimie<\/a> Cameroun 4 concours d&#8217;entr\u00e9e \u00e0 l\u2019Ecole Nationale Sup\u00e9rieure Polytechnique<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n","protected":false},"excerpt":{"rendered":"<p>&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":5914,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[1701],"tags":[1724,1712,1727,1726],"class_list":["post-6842","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-epreuves","tag-chimie","tag-epreuve-de-concours-dentree-aux-grandes-ecoles-cameroun","tag-epreuve-ensp-concours-cameroun","tag-physique"],"_links":{"self":[{"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/posts\/6842","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/comments?post=6842"}],"version-history":[{"count":0,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/posts\/6842\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/media\/5914"}],"wp:attachment":[{"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/media?parent=6842"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/categories?post=6842"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kamerpower.com\/fr\/wp-json\/wp\/v2\/tags?post=6842"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}