{"id":4768,"date":"2024-11-19T12:33:46","date_gmt":"2024-11-19T11:33:46","guid":{"rendered":"https:\/\/www.zsvltava.cz\/fyzika\/?p=4768"},"modified":"2024-11-20T08:01:43","modified_gmt":"2024-11-20T07:01:43","slug":"magneticka-indukce-2","status":"publish","type":"post","link":"https:\/\/www.zsvltava.cz\/fyzika\/?p=4768","title":{"rendered":"Magnetick\u00e1 indukce"},"content":{"rendered":"

Magnetick\u00e1 indukce (ozna\u010dovan\u00e1 jako \ud835\udc35) je fyzik\u00e1ln\u00ed veli\u010dina, kter\u00e1 popisuje intenzitu magnetick\u00e9ho pole v ur\u010dit\u00e9m m\u00edst\u011b prostoru. Ud\u00e1v\u00e1, jak siln\u011b p\u016fsob\u00ed magnetick\u00e9 pole na pohybuj\u00edc\u00ed se n\u00e1boje nebo na jin\u00e9 magnetick\u00e9 objekty. <\/strong><\/p>\n

Magnetick\u00e1 indukce je pou\u017e\u00edv\u00e1na k popisu vlastnost\u00ed magnetick\u00e9ho pole kolem magnetu nebo elektromagnetu.<\/p>\n

Vznik\u00e1 p\u0159\u00edtomnost\u00ed permanentn\u00edho magnetu nebo vodi\u010de, kter\u00fdm prot\u00e9k\u00e1 elektrick\u00fd proud.<\/p>\n

P\u0159\u00edklad: Magnet a kompas<\/h2>\n

P\u0159edstavte si, \u017ee m\u00e1te kompas, jeho\u017e jehla je voln\u011b oto\u010dn\u00e1. Kompasov\u00e1 jehla se v\u017edy orientuje pod vlivem magnetick\u00e9ho pole, kter\u00e9 na ni p\u016fsob\u00ed. Kdy\u017e kompas um\u00edst\u00edte do bl\u00edzkosti magnetu, jehla se oto\u010d\u00ed a uk\u00e1\u017ee sm\u011brem k magnetu. To ukazuje, \u017ee magnetick\u00e9 pole magnetu ovliv\u0148uje orientaci kompasov\u00e9 jehly.<\/p>\n

Magnetick\u00e1 indukce v tomto p\u0159\u00edpad\u011b ozna\u010duje s\u00edlu a sm\u011br magnetick\u00e9ho pole, kter\u00e9 je vytv\u00e1\u0159eno magnetem a ovliv\u0148uje kompasovou jehlu. \u010c\u00edm bli\u017e\u0161\u00ed budete kompas k magnetu, t\u00edm siln\u011bj\u0161\u00ed bude magnetick\u00e1 indukce a t\u00edm v\u00fdrazn\u011bj\u0161\u00ed bude s\u00edla, kterou pole na jehlu p\u016fsob\u00ed.<\/p>\n

Matematick\u00fd popis<\/h2>\n

Magnetick\u00e1 indukce je definov\u00e1na jako s\u00edla, kterou magnetick\u00e9 pole vyv\u00edj\u00ed na jednotkov\u00fd elektrick\u00fd proud v dan\u00e9m bod\u011b. M\u011b\u0159\u00ed se v jednotk\u00e1ch tesla (T).<\/p>\n

Pro pohybuj\u00edc\u00ed se n\u00e1boj se vztah mezi magnetickou indukc\u00ed a silou F, kter\u00e1 p\u016fsob\u00ed na n\u00e1boj q, vyj\u00e1d\u0159\u00ed vzorcem:<\/p>\n

  <\/span>   <\/span>\"\[<\/p>\n

\ud835\udc39 – s\u00edla p\u016fsob\u00edc\u00ed na n\u00e1boj,
\n\ud835\udc5e – velikost n\u00e1boje,
\n\ud835\udc63 – rychlost pohybuj\u00edc\u00edho se n\u00e1boje,
\n\ud835\udc35 – magnetick\u00e1 indukce,
\n\ud835\udf03 – (theta) \u00fahel mezi sm\u011brem pohybu n\u00e1boje a sm\u011brem magnetick\u00e9 indukce.<\/p>\n","protected":false},"excerpt":{"rendered":"

Magnetick\u00e1 indukce (ozna\u010dovan\u00e1 jako \ud835\udc35) je fyzik\u00e1ln\u00ed veli\u010dina, kter\u00e1 popisuje intenzitu magnetick\u00e9ho pole v ur\u010dit\u00e9m m\u00edst\u011b prostoru. Ud\u00e1v\u00e1, jak siln\u011b p\u016fsob\u00ed magnetick\u00e9 pole na pohybuj\u00edc\u00ed …. <\/p>\n","protected":false},"author":1,"featured_media":4770,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[81],"tags":[71],"class_list":["post-4768","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-magnetismus","tag-vysvetleni"],"_links":{"self":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/4768","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4768"}],"version-history":[{"count":0,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/4768\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/media\/4770"}],"wp:attachment":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}