{"id":4,"date":"2024-04-04T03:04:44","date_gmt":"2024-04-04T00:04:44","guid":{"rendered":"https:\/\/sisu.ut.ee\/elektroonika\/21-ohmi-seadus\/"},"modified":"2024-04-04T03:05:54","modified_gmt":"2024-04-04T00:05:54","slug":"21-ohmi-seadus","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/elektroonika\/21-ohmi-seadus\/","title":{"rendered":"2.1. Ohmi seadus"},"content":{"rendered":"<p><span data-mce-mark=\"1\">Ohmi seadus on elektri ja elektroonika \u00fcks alustalasid. See seadus kehtestab pinge, voolu ja takistuse vahelised seosed.\u00a0<\/span>Videos n\u00e4idatakse, kuidas on Ohmi seadusest tulenevalt omavahel seotud pinge, vool ja takistus. Lisaks n\u00e4idatakse vee voolamise ja elektrivoolu analoogiat.<\/p>\n<p>Praktilise t\u00f6\u00f6na m\u00f5\u00f5detakse toiteallikast, takistist ja h\u00f5\u00f5glambist koosnevas skeemis takisti peal olev pinge ning arvutatakse Ohmi seaduse j\u00e4rgi skeemi l\u00e4biv vool.<\/p>\n<p>Praktilise t\u00f6\u00f6 jaoks vajad j\u00e4rgmisi vahendeid:<\/p>\n<ul>\n<li>makettplaat<\/li>\n<li>nelja AA patareiga patareikarp<\/li>\n<li>10 \u2126 takisti<\/li>\n<li>h\u00f5\u00f5glamp<\/li>\n<li>multimeeter (voltmeeter)<\/li>\n<\/ul>\n<p><\/p><div class=\"ratio ratio-16x9 mb-3\"><div class=\"video-placeholder-wrapper video-placeholder-wrapper--16x9\">\n\t\t\t    <div class=\"video-placeholder d-flex justify-content-center align-items-center\">\n\t\t\t        <div class=\"overlay text-white p-2 w-100 text-center d-block justify-content-center align-items-center\">\n\t\t\t            <div>Kolmandate osapoolte sisu n\u00e4gemiseks palun n\u00f5ustu k\u00fcpsistega.<\/div>\n\t\t\t            <button class=\"btn btn-secondary btn-sm mt-1 consent-change\">Muuda n\u00f5usolekut<\/button>\n\t\t\t        <\/div>\n\t\t\t    <\/div>\n\t\t\t<\/div>\n<\/div>\n<p style=\"text-align: center\"><span data-mce-mark=\"1\"><a href=\"https:\/\/www.youtube.com\/watch?v=pRihWakCRjg\" target=\"_blank\" rel=\"noopener\"><span data-mce-mark=\"1\">https:\/\/www.youtube.com\/watch?v=pRihWakCRjg<\/span><\/a><\/span><\/p>\n<p><span data-mce-mark=\"1\">Ohmi seadus m\u00e4\u00e4rab voolu, pinge ja takistuse vahelise s\u00f5ltuvuse. Ohmi seaduse valemiks on\u00a0<\/span>$I= frac{U}{R}$, kus<\/p>\n<ul>\n<li>I \u2013 vool<\/li>\n<li>U \u2013 pinge<\/li>\n<li>R \u2013 takistus<\/li>\n<\/ul>\n<p>ehk siis\u00a0$vool= frac{pinge}{takistus}$<\/p>\n<p>N\u00e4iteks kui 10 \u2126 takisti peal m\u00f5\u00f5detakse pingeks 0,18 V, saab Ohmi seadusest v\u00e4lja arvutada, et seda takistit l\u00e4bib 0,018 A suurune vool.<\/p>\n<p><span data-mce-mark=\"1\">Ohmi seaduse valemist tuletatud valem takistuse leidmiseks:\u00a0$R= frac{U}{I}$<\/span><\/p>\n<p><span data-mce-mark=\"1\"><span data-mce-mark=\"1\"><span data-mce-mark=\"1\">Ohmi seaduse valemist tuletatud valem takistuse pinge leidmiseks:\u00a0$U= Icdot\u00a0R$ \u00a0<\/span><\/span><\/span><\/p>\n<h5><span data-mce-mark=\"1\"><span data-mce-mark=\"1\"><span data-mce-mark=\"1\"><img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"40\" class=\"alignnone wp-image-77\" style=\"margin-left: 10px;margin-right: 10px\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/189\/motle.png\" title=\"motle.png\" alt=\"motle.png\">M\u00f5tle kaasa!<\/span><\/span><\/span><\/h5>\n<ol>\n<li>15 \u2126 takisti peal m\u00f5\u00f5deti pingeks 6V. Mitme amprine vool l\u00e4bib seda takistit?<\/li>\n<li>Takistit l\u00e4bib vool 0,1 A ning pinge takisti peal on 9 V. Mitu oomi on takisti takistus?<\/li>\n<li>120 \u2126 takistist soovitakse l\u00e4bi lasta voolu 0,1 A. Mitu volti pinget peab selleks takistile rakendama?<\/li>\n<\/ol>\n<p><\/p><div class=\"accordion mb-3\">\n        <div class=\"accordion-item accordion-item--white\">\n        <h2 class=\"accordion-header\" id=\"accordion-69d2bdc6b8b0d-heading\">\n            <button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#accordion-69d2bdc6b8b0d-collapse\" aria-expanded=\"true\" aria-controls=\"accordion-69d2bdc6b8b0d-collapse\">Vastus<\/button>\n        <\/h2>\n        <div id=\"accordion-69d2bdc6b8b0d-collapse\" class=\"accordion-collapse collapse\" aria-labelledby=\"accordion-69d2bdc6b8b0d-heading\">\n            <div class=\"accordion-body\">\n<p><strong>1. 15 \u2126 takisti peal m\u00f5\u00f5deti pingeks 6V. Mitme amprine vool l\u00e4bib seda takistit?<\/strong><\/p>\n<p style=\"padding-left: 30px\">$I= frac{U}{R}$<\/p>\n<p style=\"padding-left: 30px\">$I= frac{6}{15}$\u00a0= <span style=\"color: #008000\"><strong>0,4 A<\/strong><\/span><\/p>\n<p><strong>2. Takistit l\u00e4bib vool 0,1 A ning pinge takisti peal on 9 V. Mitu oomi on takisti takistus?<\/strong><\/p>\n<p><span data-mce-mark=\"1\"><\/span><\/p>\n<p style=\"padding-left: 30px\">$R= frac{U}{I}$<\/p>\n<p style=\"padding-left: 30px\">$R= frac{9}{0,1}$\u00a0= <span style=\"color: #008000\"><strong>90\u00a0\u03a9<\/strong><\/span><\/p>\n<p><span data-mce-mark=\"1\"><\/span><\/p>\n<p><strong>3. 120 \u2126 takistist soovitakse l\u00e4bi lasta voolu 0,1 A. Mitu volti pinget peab selleks takistile rakendama?<\/strong><\/p>\n<p style=\"padding-left: 30px\">$U= Icdot\u00a0R$<\/p>\n<p style=\"padding-left: 30px\">$U= 0,1cdot\u00a0120$\u00a0= <span style=\"color: #008000\"><strong>12 V<\/strong><\/span><\/p>\n<p><span data-mce-mark=\"1\"><\/span><\/p><\/div>\n        <\/div>\n        <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Ohmi seadus on elektri ja elektroonika \u00fcks alustalasid. See seadus kehtestab pinge, voolu ja takistuse vahelised seosed.\u00a0Videos n\u00e4idatakse, kuidas on Ohmi seadusest tulenevalt omavahel seotud pinge, vool ja takistus. Lisaks n\u00e4idatakse vee voolamise ja elektrivoolu analoogiat. Praktilise t\u00f6\u00f6na m\u00f5\u00f5detakse toiteallikast, &#8230;<\/p>\n","protected":false},"author":93,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-4","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/4","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/users\/93"}],"replies":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/comments?post=4"}],"version-history":[{"count":1,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/4\/revisions"}],"predecessor-version":[{"id":259,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/4\/revisions\/259"}],"wp:attachment":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/media?parent=4"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}