\u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2 c\u00f3 \u0111\u00e1p \u00e1n chi ti\u1ebft, c\u00e1c em tham kh\u1ea3o b\u00ean d\u01b0\u1edbi \u0111\u00e2y:<\/strong><\/h2>\n\u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2<\/strong><\/h4>\nC\u00e2u 19:<\/strong> M\u1ed9t con l\u1eafc l\u00f2 xo \u0111ang dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. Khi l\u00f2 xo c\u00f3 chi\u1ec1u d\u00e0i l\u1edbn nh\u1ea5t th\u00ec<\/p>\n A. <\/strong>\u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u1ee7a v\u1eadt b\u1eb1ng nhau. B. <\/strong>\u0111\u1ed9ng n\u0103ng v\u00e0 c\u01a1 n\u0103ng c\u1ee7a v\u1eadt b\u1eb1ng nhau.<\/p>\n C. <\/strong>gia t\u1ed1c c\u1ee7a v\u1eadt c\u00f3 \u0111\u1ed9 l\u1edbn c\u1ef1c \u0111\u1ea1i. D. <\/strong>v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt c\u00f3 \u0111\u1ed9 l\u1edbn c\u1ef1c \u0111\u1ea1i.<\/p>\nC\u00e2u 20:<\/strong> H\u00ecnh d\u01b0\u1edbi \u0111\u00e2y m\u00f4 t\u1ea3 m\u1ed9t s\u00f3ng d\u1eebng tr\u00ean s\u1ee3i d\u00e2y MN. G\u1ecdi H l\u00e0 m\u1ed9t \u0111i\u1ec3m tr\u00ean d\u00e2y n\u1eb1m gi\u1eefa n\u00fat M v\u00e0 n\u00fat P, K l\u00e0 m\u1ed9t \u0111i\u1ec3m n\u1eb1m gi\u1eefa n\u00fat Q v\u00e0 n\u00fat N. K\u1ebft lu\u1eadn n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang?<\/p>\n A. <\/strong>H v\u00e0 K dao \u0111\u1ed9ng l\u1ec7ch pha nhau g\u00f3c \u03c0\/5. B. <\/strong>H v\u00e0 K dao \u0111\u1ed9ng ng\u01b0\u1ee3c pha v\u1edbi nhau.<\/p>\n C. <\/strong>H v\u00e0 K dao \u0111\u1ed9ng l\u1ec7ch pha nhau g\u00f3c \u03c0\/2. D. <\/strong>H v\u00e0 K dao \u0111\u1ed9ng c\u00f9ng pha v\u1edbi nhau.<\/p>\nC\u00e2u 21:<\/strong> M\u1ed9t con l\u1eafc l\u00f2 xo g\u1ed3m l\u00f2 xo nh\u1eb9 c\u00f3 \u0111\u1ed9 c\u1ee9ng 100N\/m, m\u1ed9t \u0111\u1ea7u g\u1eafn c\u1ed1 \u0111\u1ecbnh v\u00e0o t\u01b0\u1eddng, m\u1ed9t \u0111\u1ea7u g\u1eafn v\u1edbi m\u1ed9t v\u1eadt nh\u1ecf c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1kg, \u0111\u1eb7t tr\u00ean m\u1eb7t ph\u1eb3ng n\u1eb1m ngang nh\u1eb5n. Ban \u0111\u1ea7u ng\u01b0\u1eddi ta d\u00f9ng m\u1ed9t gi\u00e1 ch\u1eb7n ti\u1ebfp x\u00fac v\u1edbi v\u1eadt l\u00e0m cho l\u00f2 xo b\u1ecb n\u00e9n m\u1ed9t \u0111o\u1ea1n 17\/3 cm. Sau \u0111\u00f3 cho gi\u00e1 ch\u1eb7n chuy\u1ec3n \u0111\u1ed9ng nhanh d\u1ea7n \u0111\u1ec1u d\u1ecdc theo tr\u1ee5c l\u00f2 xo ra xa t\u01b0\u1eddng v\u1edbi gia t\u1ed1c 3m\/s<\/p>\n2<\/dd>\n. Bi\u00ean \u0111\u1ed9 dao \u0111\u1ed9ng c\u1ee7a v\u1eadt sau khi r\u1eddi kh\u1ecfi gi\u00e1 ch\u1eb7n l\u00e0<\/p>\n
A. <\/strong>3,1cm. B. <\/strong>5,7cm. C. <\/strong>4,7cm. D. <\/strong>5,0cm.<\/p>\nC\u00e2u 22:<\/strong> \u0110i\u1ec7n tr\u1edf thu\u1ea7 R=130\u2126 \u0111\u01b0\u1ee3c m\u1eafc v\u00e0o gi\u1eefa hai \u0111i\u1ec3m c\u00f3 \u0111i\u1ec7n \u00e1p u =130![](\"http:\/\/latex.codecogs.com\/gif.latex?\\sqrt{2}\")
cos(100\u03c0t)V. C\u00f4ng su\u1ea5t t\u1ecfa nhi\u1ec7t t\u1ee9c th\u1eddi tr\u00ean \u0111i\u1ec7n tr\u1edf bi\u1ebfn thi\u00ean v\u1edbi t\u1ea7n s\u1ed1 b\u1eb1ng<\/p>\n A. <\/strong>100Hz. B. <\/strong>50Hz. C. <\/strong>25Hz. D. <\/strong>50\u03c0Hz.<\/p>\nC\u00e2u 23:<\/strong> H\u00ecnh d\u01b0\u1edbi \u0111\u00e2y m\u00f4 t\u1ea3 \u0111\u1ed3 th\u1ecb c\u00e1c \u0111i\u1ec7n \u00e1p t\u1ee9c th\u1eddi tr\u00ean m\u1ed9t \u0111o\u1ea1n m\u1ea1ch RLC n\u1ed1i ti\u1ebfp,<\/p>\ng\u1ed3m \u0111i\u1ec7n \u00e1p \u1edf hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch u, \u0111i\u1ec7n \u00e1p \u1edf hai \u0111\u1ea7u \u0111i\u1ec7n tr\u1edf thu\u1ea7n u<\/p>\n
R<\/dd>\n, \u0111i\u1ec7n \u00e1p \u1edf hai \u0111\u1ea7u cu\u1ed9n c\u1ea3m thu\u1ea7n u<\/p>\n
L<\/dd>\n v\u00e0 \u0111i\u1ec7n \u00e1p \u1edf hai \u0111\u1ea7u t\u1ee5 \u0111i\u1ec7n u<\/p>\n
C<\/dd>\n. C\u00e1c \u0111\u01b0\u1eddng sin 1, 2, 3, 4 theo th\u1ee9 t\u1ef1 l\u1ea7n l\u01b0\u1ee3t l\u00e0 \u0111\u1ed3 th\u1ecb c\u1ee7a<\/p>\n
![](\"http:\/\/img.toanhoc247.com\/picture\/2016\/0220\/1.png\")
<\/p>\n
A. <\/strong>u, u<\/p>\nC<\/dd>\n, u<\/p>\n
R<\/dd>\n, u<\/p>\n
L<\/dd>\n B. <\/strong>u, u<\/p>\nR<\/dd>\n, u<\/p>\n
L<\/dd>\n, u<\/p>\n
C<\/dd>\n<\/p>\n<\/strong> C. <\/strong>u<\/p>\nL<\/dd>\n, u, u<\/p>\n
R<\/dd>\n, u<\/p>\n
C<\/dd>\n D. <\/strong>u<\/p>\nC<\/dd>\n, u, u<\/p>\n
R<\/dd>\n, u<\/p>\n
L<\/dd>\n.<\/p>\n
C\u00e2u 24:<\/strong> M\u1ed9t v\u1eadt dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a d\u1ecdc theo tr\u1ee5c Ox v\u1edbi bi\u00ean \u0111\u1ed9 A xung quanh v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng O. Khi v\u1eadt \u1edf c\u00f3 li \u0111\u1ed9 x=0,75A th\u00ec t\u1ec9 s\u1ed1 gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 c\u01a1 n\u0103ng c\u1ee7a v\u1eadt b\u1eb1ng<\/p>\n A. <\/strong>9\/16 B. <\/strong>7\/9 C.<\/strong> 7\/16 D.<\/strong>9\/7 . <\/p>\n![](\"http:\/\/img.toanhoc247.com\/picture\/2016\/0220\/de-thi-thu-thptqg-ly-2016-thpt-yen-lac-lan-2_1.png\")
<\/p>\n
\u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2<\/strong><\/h4>\n![](\"http:\/\/img.toanhoc247.com\/picture\/2016\/0220\/dap-an-de-thi-thu-thptqg-ly-2016-thptyen-lac.png\")
<\/strong><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"\u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2 c\u00f3 \u0111\u00e1p \u00e1n chi ti\u1ebft, c\u00e1c em tham kh\u1ea3o b\u00ean d\u01b0\u1edbi \u0111\u00e2y: \u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2 C\u00e2u 19: M\u1ed9t con l\u1eafc l\u00f2 xo \u0111ang dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. Khi l\u00f2 xo c\u00f3 chi\u1ec1u d\u00e0i […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[25],"tags":[],"yoast_head":"\n
\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c Gia m\u00f4n L\u00fd 2016 THPT Y\u00ean L\u1ea1c l\u1ea7n 2<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c Gia m\u00f4n L\u00fd 2016 THPT Y\u00ean L\u1ea1c l\u1ea7n 2\" \/>\n<meta property=\"og:description\" content=\"\u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2 c\u00f3 \u0111\u00e1p \u00e1n chi ti\u1ebft, c\u00e1c em tham kh\u1ea3o b\u00ean d\u01b0\u1edbi \u0111\u00e2y: \u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2 C\u00e2u 19: M\u1ed9t con l\u1eafc l\u00f2 xo \u0111ang dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. Khi l\u00f2 xo c\u00f3 chi\u1ec1u d\u00e0i […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12 l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam\" \/>\n<meta property=\"article:author\" content=\"www.facebook.com\/lop12.edu.vn\/\" \/>\n<meta property=\"article:published_time\" content=\"2016-03-19T23:00:21+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2016-03-20T16:02:32+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/latex.codecogs.com\/gif.latex?sqrt2\" \/>\n<meta name=\"author\" content=\"Lop12\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Lop12\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/\",\"url\":\"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/\",\"name\":\"\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c Gia m\u00f4n L\u00fd 2016 THPT Y\u00ean L\u1ea1c l\u1ea7n 2\",\"isPartOf\":{\"@id\":\"https:\/\/lop12.edu.vn\/#website\"},\"datePublished\":\"2016-03-19T23:00:21+00:00\",\"dateModified\":\"2016-03-20T16:02:32+00:00\",\"author\":{\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/8219caa3d91a087a4ce81b8b5ac734b5\"},\"breadcrumb\":{\"@id\":\"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/lop12.edu.vn\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c Gia m\u00f4n L\u00fd 2016 THPT Y\u00ean L\u1ea1c l\u1ea7n 2\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/lop12.edu.vn\/#website\",\"url\":\"https:\/\/lop12.edu.vn\/\",\"name\":\"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/lop12.edu.vn\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/8219caa3d91a087a4ce81b8b5ac734b5\",\"name\":\"Lop12\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/65b2897b6a31b932be1276ba7fc18d41?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/65b2897b6a31b932be1276ba7fc18d41?s=96&d=mm&r=g\",\"caption\":\"Lop12\"},\"sameAs\":[\"http:\/\/www.lop12.edu.vn\",\"www.facebook.com\/lop12.edu.vn\/\"],\"url\":\"https:\/\/lop12.edu.vn\/author\/hungld\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c Gia m\u00f4n L\u00fd 2016 THPT Y\u00ean L\u1ea1c l\u1ea7n 2","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/","og_locale":"en_US","og_type":"article","og_title":"\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c Gia m\u00f4n L\u00fd 2016 THPT Y\u00ean L\u1ea1c l\u1ea7n 2","og_description":"\u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2 c\u00f3 \u0111\u00e1p \u00e1n chi ti\u1ebft, c\u00e1c em tham kh\u1ea3o b\u00ean d\u01b0\u1edbi \u0111\u00e2y: \u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2 C\u00e2u 19: M\u1ed9t con l\u1eafc l\u00f2 xo \u0111ang dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. Khi l\u00f2 xo c\u00f3 chi\u1ec1u d\u00e0i […]","og_url":"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/","og_site_name":"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12 l\u1edbn nh\u1ea5t t\u1ea1i Vi\u1ec7t Nam","article_author":"www.facebook.com\/lop12.edu.vn\/","article_published_time":"2016-03-19T23:00:21+00:00","article_modified_time":"2016-03-20T16:02:32+00:00","og_image":[{"url":"http:\/\/latex.codecogs.com\/gif.latex?\\sqrt{2}"}],"author":"Lop12","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Lop12","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/","url":"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/","name":"\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c Gia m\u00f4n L\u00fd 2016 THPT Y\u00ean L\u1ea1c l\u1ea7n 2","isPartOf":{"@id":"https:\/\/lop12.edu.vn\/#website"},"datePublished":"2016-03-19T23:00:21+00:00","dateModified":"2016-03-20T16:02:32+00:00","author":{"@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/8219caa3d91a087a4ce81b8b5ac734b5"},"breadcrumb":{"@id":"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/lop12.edu.vn\/de-thi-thu-thpt-quoc-gia-mon-ly-2016-thpt-yen-lac-lan-2\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/lop12.edu.vn\/"},{"@type":"ListItem","position":2,"name":"\u0110\u1ec1 thi th\u1eed THPT Qu\u1ed1c Gia m\u00f4n L\u00fd 2016 THPT Y\u00ean L\u1ea1c l\u1ea7n 2"}]},{"@type":"WebSite","@id":"https:\/\/lop12.edu.vn\/#website","url":"https:\/\/lop12.edu.vn\/","name":"Lop12.edu.vn - C\u1ed9ng \u0111\u1ed3ng h\u1ecdc sinh l\u1edbp 12","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/lop12.edu.vn\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/8219caa3d91a087a4ce81b8b5ac734b5","name":"Lop12","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/65b2897b6a31b932be1276ba7fc18d41?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/65b2897b6a31b932be1276ba7fc18d41?s=96&d=mm&r=g","caption":"Lop12"},"sameAs":["http:\/\/www.lop12.edu.vn","www.facebook.com\/lop12.edu.vn\/"],"url":"https:\/\/lop12.edu.vn\/author\/hungld\/"}]}},"_links":{"self":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/1617"}],"collection":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/comments?post=1617"}],"version-history":[{"count":0,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/posts\/1617\/revisions"}],"wp:attachment":[{"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/media?parent=1617"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/categories?post=1617"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lop12.edu.vn\/wp-json\/wp\/v2\/tags?post=1617"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
C\u00e2u 19:<\/strong> M\u1ed9t con l\u1eafc l\u00f2 xo \u0111ang dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. Khi l\u00f2 xo c\u00f3 chi\u1ec1u d\u00e0i l\u1edbn nh\u1ea5t th\u00ec<\/p>\n A. <\/strong>\u0111\u1ed9ng n\u0103ng v\u00e0 th\u1ebf n\u0103ng c\u1ee7a v\u1eadt b\u1eb1ng nhau. B. <\/strong>\u0111\u1ed9ng n\u0103ng v\u00e0 c\u01a1 n\u0103ng c\u1ee7a v\u1eadt b\u1eb1ng nhau.<\/p>\n C. <\/strong>gia t\u1ed1c c\u1ee7a v\u1eadt c\u00f3 \u0111\u1ed9 l\u1edbn c\u1ef1c \u0111\u1ea1i. D. <\/strong>v\u1eadn t\u1ed1c c\u1ee7a v\u1eadt c\u00f3 \u0111\u1ed9 l\u1edbn c\u1ef1c \u0111\u1ea1i.<\/p>\n C\u00e2u 20:<\/strong> H\u00ecnh d\u01b0\u1edbi \u0111\u00e2y m\u00f4 t\u1ea3 m\u1ed9t s\u00f3ng d\u1eebng tr\u00ean s\u1ee3i d\u00e2y MN. G\u1ecdi H l\u00e0 m\u1ed9t \u0111i\u1ec3m tr\u00ean d\u00e2y n\u1eb1m gi\u1eefa n\u00fat M v\u00e0 n\u00fat P, K l\u00e0 m\u1ed9t \u0111i\u1ec3m n\u1eb1m gi\u1eefa n\u00fat Q v\u00e0 n\u00fat N. K\u1ebft lu\u1eadn n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang?<\/p>\n A. <\/strong>H v\u00e0 K dao \u0111\u1ed9ng l\u1ec7ch pha nhau g\u00f3c \u03c0\/5. B. <\/strong>H v\u00e0 K dao \u0111\u1ed9ng ng\u01b0\u1ee3c pha v\u1edbi nhau.<\/p>\n C. <\/strong>H v\u00e0 K dao \u0111\u1ed9ng l\u1ec7ch pha nhau g\u00f3c \u03c0\/2. D. <\/strong>H v\u00e0 K dao \u0111\u1ed9ng c\u00f9ng pha v\u1edbi nhau.<\/p>\n C\u00e2u 21:<\/strong> M\u1ed9t con l\u1eafc l\u00f2 xo g\u1ed3m l\u00f2 xo nh\u1eb9 c\u00f3 \u0111\u1ed9 c\u1ee9ng 100N\/m, m\u1ed9t \u0111\u1ea7u g\u1eafn c\u1ed1 \u0111\u1ecbnh v\u00e0o t\u01b0\u1eddng, m\u1ed9t \u0111\u1ea7u g\u1eafn v\u1edbi m\u1ed9t v\u1eadt nh\u1ecf c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng 1kg, \u0111\u1eb7t tr\u00ean m\u1eb7t ph\u1eb3ng n\u1eb1m ngang nh\u1eb5n. Ban \u0111\u1ea7u ng\u01b0\u1eddi ta d\u00f9ng m\u1ed9t gi\u00e1 ch\u1eb7n ti\u1ebfp x\u00fac v\u1edbi v\u1eadt l\u00e0m cho l\u00f2 xo b\u1ecb n\u00e9n m\u1ed9t \u0111o\u1ea1n 17\/3 cm. Sau \u0111\u00f3 cho gi\u00e1 ch\u1eb7n chuy\u1ec3n \u0111\u1ed9ng nhanh d\u1ea7n \u0111\u1ec1u d\u1ecdc theo tr\u1ee5c l\u00f2 xo ra xa t\u01b0\u1eddng v\u1edbi gia t\u1ed1c 3m\/s<\/p>\n . Bi\u00ean \u0111\u1ed9 dao \u0111\u1ed9ng c\u1ee7a v\u1eadt sau khi r\u1eddi kh\u1ecfi gi\u00e1 ch\u1eb7n l\u00e0<\/p>\n A. <\/strong>3,1cm. B. <\/strong>5,7cm. C. <\/strong>4,7cm. D. <\/strong>5,0cm.<\/p>\n C\u00e2u 22:<\/strong> \u0110i\u1ec7n tr\u1edf thu\u1ea7 R=130\u2126 \u0111\u01b0\u1ee3c m\u1eafc v\u00e0o gi\u1eefa hai \u0111i\u1ec3m c\u00f3 \u0111i\u1ec7n \u00e1p u =130 A. <\/strong>100Hz. B. <\/strong>50Hz. C. <\/strong>25Hz. D. <\/strong>50\u03c0Hz.<\/p>\n C\u00e2u 23:<\/strong> H\u00ecnh d\u01b0\u1edbi \u0111\u00e2y m\u00f4 t\u1ea3 \u0111\u1ed3 th\u1ecb c\u00e1c \u0111i\u1ec7n \u00e1p t\u1ee9c th\u1eddi tr\u00ean m\u1ed9t \u0111o\u1ea1n m\u1ea1ch RLC n\u1ed1i ti\u1ebfp,<\/p>\n g\u1ed3m \u0111i\u1ec7n \u00e1p \u1edf hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch u, \u0111i\u1ec7n \u00e1p \u1edf hai \u0111\u1ea7u \u0111i\u1ec7n tr\u1edf thu\u1ea7n u<\/p>\n , \u0111i\u1ec7n \u00e1p \u1edf hai \u0111\u1ea7u cu\u1ed9n c\u1ea3m thu\u1ea7n u<\/p>\n v\u00e0 \u0111i\u1ec7n \u00e1p \u1edf hai \u0111\u1ea7u t\u1ee5 \u0111i\u1ec7n u<\/p>\n . C\u00e1c \u0111\u01b0\u1eddng sin 1, 2, 3, 4 theo th\u1ee9 t\u1ef1 l\u1ea7n l\u01b0\u1ee3t l\u00e0 \u0111\u1ed3 th\u1ecb c\u1ee7a<\/p>\n A. <\/strong>u, u<\/p>\n , u<\/p>\n , u<\/p>\n B. <\/strong>u, u<\/p>\n , u<\/p>\n , u<\/p>\n <\/strong> C. <\/strong>u<\/p>\n , u, u<\/p>\n , u<\/p>\n D. <\/strong>u<\/p>\n , u, u<\/p>\n , u<\/p>\n .<\/p>\n C\u00e2u 24:<\/strong> M\u1ed9t v\u1eadt dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a d\u1ecdc theo tr\u1ee5c Ox v\u1edbi bi\u00ean \u0111\u1ed9 A xung quanh v\u1ecb tr\u00ed c\u00e2n b\u1eb1ng O. Khi v\u1eadt \u1edf c\u00f3 li \u0111\u1ed9 x=0,75A th\u00ec t\u1ec9 s\u1ed1 gi\u1eefa \u0111\u1ed9ng n\u0103ng v\u00e0 c\u01a1 n\u0103ng c\u1ee7a v\u1eadt b\u1eb1ng<\/p>\n A. <\/strong>9\/16 B. <\/strong>7\/9 C.<\/strong> 7\/16 D.<\/strong>9\/7 . <\/p>\n \u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2 c\u00f3 \u0111\u00e1p \u00e1n chi ti\u1ebft, c\u00e1c em tham kh\u1ea3o b\u00ean d\u01b0\u1edbi \u0111\u00e2y: \u0110\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2 C\u00e2u 19: M\u1ed9t con l\u1eafc l\u00f2 xo \u0111ang dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a. Khi l\u00f2 xo c\u00f3 chi\u1ec1u d\u00e0i […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[25],"tags":[],"yoast_head":"\ncos(100\u03c0t)V. C\u00f4ng su\u1ea5t t\u1ecfa nhi\u1ec7t t\u1ee9c th\u1eddi tr\u00ean \u0111i\u1ec7n tr\u1edf bi\u1ebfn thi\u00ean v\u1edbi t\u1ea7n s\u1ed1 b\u1eb1ng<\/p>\n
<\/p>\n<\/p>\n\u0110\u00e1p \u00e1n \u0111\u1ec1 thi th\u1eed THPTQG m\u00f4n L\u00fd 2016 – THPT Y\u00ean L\u1ea1c l\u1ea7n 2<\/strong><\/h4>\n
<\/strong><\/p><\/p>\n","protected":false},"excerpt":{"rendered":"