Ch\u01b0\u01a1ng 4 - B\u00e0i 20: M\u1ea1ch dao \u0111\u1ed9ng<\/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\/chuong-4-bai-20-mach-dao-dong\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 4 - B\u00e0i 20: M\u1ea1ch dao \u0111\u1ed9ng\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 107 SGK V\u1eadt L\u00fd 12):\u00a0M\u1ea1ch dao \u0111\u1ed9ng l\u00e0 g\u00ec? L\u1eddi gi\u1ea3i: M\u1ea1ch dao \u0111\u1ed9ng l\u00e0 m\u1ea1ch \u0111i\u1ec7n k\u00edn g\u1ed3m m\u1ed9t t\u1ee5 \u0111i\u1ec7n C m\u1eafc n\u1ed1i ti\u1ebfp v\u1edbi cu\u1ed9n c\u1ea3m L. B\u00e0i 2 (trang 107 SGK V\u1eadt L\u00fd 12):\u00a0N\u00eau \u0111\u1ecbnh lu\u1eadt bi\u1ebfn thi\u00ean c\u1ee7a \u0111i\u1ec7n t\u00edch c\u1ee7a m\u1ed9t b\u1ea3n t\u1ee5 \u0111i\u1ec7n v\u00e0 c\u01b0\u1eddng […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/chuong-4-bai-20-mach-dao-dong\/\" \/>\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:published_time\" content=\"2018-03-30T09:21:50+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/bai-3-trang-107-sgk-vat-ly-12.png\" \/>\n\t<meta property=\"og:image:width\" content=\"158\" \/>\n\t<meta property=\"og:image:height\" content=\"60\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"H\u00e0 Trang\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"H\u00e0 Trang\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/lop12.edu.vn\/chuong-4-bai-20-mach-dao-dong\/\",\"url\":\"https:\/\/lop12.edu.vn\/chuong-4-bai-20-mach-dao-dong\/\",\"name\":\"Ch\u01b0\u01a1ng 4 - B\u00e0i 20: M\u1ea1ch dao \u0111\u1ed9ng\",\"isPartOf\":{\"@id\":\"https:\/\/lop12.edu.vn\/#website\"},\"datePublished\":\"2018-03-30T09:21:50+00:00\",\"dateModified\":\"2018-03-30T09:21:50+00:00\",\"author\":{\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/2da855e5d06b553ac0065157cc261a45\"},\"breadcrumb\":{\"@id\":\"https:\/\/lop12.edu.vn\/chuong-4-bai-20-mach-dao-dong\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/lop12.edu.vn\/chuong-4-bai-20-mach-dao-dong\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/lop12.edu.vn\/chuong-4-bai-20-mach-dao-dong\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/lop12.edu.vn\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Ch\u01b0\u01a1ng 4 – B\u00e0i 20: M\u1ea1ch dao \u0111\u1ed9ng\"}]},{\"@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\/2da855e5d06b553ac0065157cc261a45\",\"name\":\"H\u00e0 Trang\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/lop12.edu.vn\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/545a8100db1147f314111301d261dc33?s=96&d=mm&r=g\",\"caption\":\"H\u00e0 Trang\"},\"url\":\"https:\/\/lop12.edu.vn\/author\/trangvth2\/\"}]}<\/script>\n","yoast_head_json":{"title":"Ch\u01b0\u01a1ng 4 - B\u00e0i 20: M\u1ea1ch dao \u0111\u1ed9ng","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\/chuong-4-bai-20-mach-dao-dong\/","og_locale":"en_US","og_type":"article","og_title":"Ch\u01b0\u01a1ng 4 - B\u00e0i 20: M\u1ea1ch dao \u0111\u1ed9ng","og_description":"B\u00e0i 1 (trang 107 SGK V\u1eadt L\u00fd 12):\u00a0M\u1ea1ch dao \u0111\u1ed9ng l\u00e0 g\u00ec? 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B\u00e0i 1 (trang 107 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0M\u1ea1ch dao \u0111\u1ed9ng l\u00e0 g\u00ec?<\/span><\/p>\n

M\u1ea1ch dao \u0111\u1ed9ng l\u00e0 m\u1ea1ch \u0111i\u1ec7n k\u00edn g\u1ed3m m\u1ed9t t\u1ee5 \u0111i\u1ec7n C m\u1eafc n\u1ed1i ti\u1ebfp v\u1edbi cu\u1ed9n c\u1ea3m L.<\/p>\n

B\u00e0i 2 (trang 107 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0N\u00eau \u0111\u1ecbnh lu\u1eadt bi\u1ebfn thi\u00ean c\u1ee7a \u0111i\u1ec7n t\u00edch c\u1ee7a m\u1ed9t b\u1ea3n t\u1ee5 \u0111i\u1ec7n v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch dao \u0111\u1ed9ng.<\/span><\/p>\n

\u0110\u1ecbnh lu\u1eadt bi\u1ebfn thi\u00ean: \u0111i\u1ec7n t\u00edch q \u1edf hai b\u1ea3n t\u1ee5 \u0111i\u1ec7n v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n I trong m\u1ea1ch dao \u0111\u1ed9ng bi\u1ebfn thi\u00ean \u0111i\u1ec1u h\u00f2a v\u1edbi c\u00f9ng t\u1ea7n s\u1ed1 g\u00f3c, i s\u1edbm pha \u03c0\/2 so v\u1edbi q.<\/p>\n

Bi\u1ec3u th\u1ee9c \u0111i\u1ec7n t\u00edch: q = q_{0<\/sub>\u00a0cos(\u03c9t + \u03c6)<\/p>\n}

Bi\u1ec3u th\u1ee9c c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n trong m\u1ea1ch: i = = I_{0<\/sub>cos(\u03c9t + \u03c6 + \u03c0\/2)<\/p>\n}

B\u00e0i 3 (trang 107 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Vi\u1ebft c\u00f4ng th\u1ee9c t\u00ednh chu k\u00ec v\u00e0 t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng ri\u00eang c\u1ee7a m\u1ea1ch dao \u0111\u1ed9ng.<\/span><\/p>\n

C\u00f4ng th\u1ee9c chu k\u00ec v\u00e0 t\u1ea7n s\u1ed1 c\u1ee7a m\u1ea1ch dao \u0111\u1ed9ng<\/p>\n

Chu k\u00ec dao \u0111\u1ed9ng ri\u00eang c\u1ee7a m\u1ea1ch dao \u0111\u1ed9ng:<\/p>\n

B\u00e0i 4 (trang 107 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Dao \u0111\u1ed9ng \u0111i\u1ec7n t\u1eeb t\u1ef1 do l\u00e0 g\u00ec?<\/span><\/p>\n

Dao \u0111\u1ed9ng \u0111i\u1ec7n t\u1eeb t\u1ef1 do l\u00e0 s\u1ef1 bi\u1ebfn thi\u00ean \u0111i\u1ec1u h\u00f2a c\u1ee7a \u0111i\u1ec7n t\u00edch q v\u00e0 c\u01b0\u1eddng \u0111\u1ed9 i (hay c\u01b0\u1eddng \u0111\u1ed9 \u0111i\u1ec7n tr\u01b0\u1eddng E v\u00e0 c\u1ea3m \u1ee9ng t\u1eeb B) trong m\u1ea1ch dao \u0111\u1ed9ng.<\/p>\n

B\u00e0i 5 (trang 107 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0N\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n t\u1eeb l\u00e0 g\u00ec?<\/span><\/p>\n

T\u1ed5ng n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n tr\u01b0\u1eddng v\u00e0 n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n tr\u01b0\u1eddng v\u00e0 n\u0103ng l\u01b0\u1ee3ng t\u1eeb tr\u01b0\u1eddng c\u1ee7a m\u1ea1ch g\u1ecdi l\u00e0 n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n t\u1eeb. N\u1ebfu kh\u00f4ng c\u00f3 s\u1ef1 ti\u00eau hao n\u0103ng l\u01b0\u1ee3ng th\u00ec n\u0103ng l\u01b0\u1ee3ng \u0111i\u1ec7n t\u1eeb trong m\u1ea1ch s\u1ebd \u0111\u01b0\u1ee3c b\u1ea3o to\u00e0n.<\/p>\n

\n
\n
B\u00e0i 6 (trang 107 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0S\u1ef1 bi\u1ebfn thi\u00ean c\u1ee7a d\u00f2ng \u0111i\u1ec7n i trong m\u1ed9t dao \u0111\u1ed9ng l\u1ec7ch pha nh\u01b0 th\u1ebf n\u00e0o so v\u1edbi s\u1ef1 bi\u1ebfn thi\u00ean c\u1ee7a \u0111i\u1ec7n t\u00edch q c\u1ee7a m\u1ed9t b\u1ea3n t\u1ee5 \u0111i\u1ec7n?<\/span><\/p>\n
$\"\"$ <\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn \u0111\u00e1p \u00e1n C.<\/p>\n
B\u00e0i 7 (trang 107 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0N\u1ebfu t\u0103ng s\u1ed1 v\u00f2ng d\u00e2y c\u1ee7a cu\u1ed9n c\u1ea3m th\u00ec chu k\u00ec c\u1ee7a dao \u0111\u1ed9ng \u0111i\u1ec7n t\u1eeb s\u1ebd thay \u0111\u1ed5i nh\u01b0 th\u1ebf n\u00e0o?<\/span><\/p>\n
A. T\u0103ng<\/p>\n
B. Gi\u1ea3m<\/p>\n
C. Kh\u00f4ng \u0111\u1ed5i<\/p>\n
D. Kh\u00f4ng \u0111\u1ee7 c\u01a1 s\u1edf \u0111\u1ec3 tr\u1ea3 l\u1eddi<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn \u0111\u00e1p \u00e1n A.<\/p>\n
H\u01b0\u1edbng d\u1eabn: Ta c\u00f3 T = 2\u03c0\u221aLC, L ph\u1ee5 thu\u1ed9c v\u00e0o k\u00edch th\u01b0\u1edbc c\u1ee7a cu\u1ed9n d\u00e2y v\u00e0 s\u1ed1 v\u00f2ng c\u1ee7a cu\u1ed9n d\u00e2y. N\u1ebfu s\u1ed1 v\u00f2ng c\u1ee7a cu\u1ed9n d\u00e2y t\u0103ng suy ra L t\u0103ng \u21d2 T t\u0103ng.<\/p>\n
B\u00e0i 8 (trang 107 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0T\u00ednh chu k\u00ec v\u00e0 t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng ri\u00eang c\u1ee7a m\u1ed9t m\u1ea1ch dao \u0111\u1ed9ng, bi\u1ebft t\u1ee5 \u0111i\u1ec7n trong m\u1ea1ch c\u00f3 \u0111i\u1ec7n dung l\u00e0 120pF v\u00e0 cu\u1ed9n c\u1ea3m c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m l\u00e0 3mH.<\/span><\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Chu k\u00ec v\u00e0 t\u1ea7n s\u1ed1 dao \u0111\u1ed9ng ri\u00eang c\u1ee7a m\u1ea1ch dao \u0111\u1ed9ng<\/p>\n
$\"\"$ <\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 1 (trang 107 SGK V\u1eadt L\u00fd 12):\u00a0M\u1ea1ch dao \u0111\u1ed9ng l\u00e0 g\u00ec? L\u1eddi gi\u1ea3i: M\u1ea1ch dao \u0111\u1ed9ng l\u00e0 m\u1ea1ch \u0111i\u1ec7n k\u00edn g\u1ed3m m\u1ed9t t\u1ee5 \u0111i\u1ec7n C m\u1eafc n\u1ed1i ti\u1ebfp v\u1edbi cu\u1ed9n c\u1ea3m L. B\u00e0i 2 (trang 107 SGK V\u1eadt L\u00fd 12):\u00a0N\u00eau \u0111\u1ecbnh lu\u1eadt bi\u1ebfn thi\u00ean c\u1ee7a \u0111i\u1ec7n t\u00edch c\u1ee7a m\u1ed9t b\u1ea3n t\u1ee5 \u0111i\u1ec7n v\u00e0 c\u01b0\u1eddng […]<\/p>\n","protected":false},"author":3,"featured_media":24785,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1303],"tags":[1428,1427],"yoast_head":"\nCh\u01b0\u01a1ng 4 - B\u00e0i 20: M\u1ea1ch dao \u0111\u1ed9ng<\/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\/chuong-4-bai-20-mach-dao-dong\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ch\u01b0\u01a1ng 4 - B\u00e0i 20: M\u1ea1ch dao \u0111\u1ed9ng\" \/>\n<meta property=\"og:description\" content=\"B\u00e0i 1 (trang 107 SGK V\u1eadt L\u00fd 12):\u00a0M\u1ea1ch dao \u0111\u1ed9ng l\u00e0 g\u00ec? L\u1eddi gi\u1ea3i: M\u1ea1ch dao \u0111\u1ed9ng l\u00e0 m\u1ea1ch \u0111i\u1ec7n k\u00edn g\u1ed3m m\u1ed9t t\u1ee5 \u0111i\u1ec7n C m\u1eafc n\u1ed1i ti\u1ebfp v\u1edbi cu\u1ed9n c\u1ea3m L. 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