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{"id":25111,"date":"2018-04-03T16:56:53","date_gmt":"2018-04-03T09:56:53","guid":{"rendered":"https:\/\/lop12.edu.vn\/?p=25111"},"modified":"2018-04-03T16:56:53","modified_gmt":"2018-04-03T09:56:53","slug":"chuong-5-bai-28-mach-co-r-l-c-mac-noi-tiep-cong-huong-dien","status":"publish","type":"post","link":"https:\/\/lop12.edu.vn\/chuong-5-bai-28-mach-co-r-l-c-mac-noi-tiep-cong-huong-dien\/","title":{"rendered":"Ch\u01b0\u01a1ng 5 – B\u00e0i 28: M\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp. C\u1ed9ng h\u01b0\u1edfng \u0111i\u1ec7n"},"content":{"rendered":"

C\u00c2U H\u1eceI<\/strong><\/p>\n

C\u00e2u 1 (trang 156 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Vi\u1ebft c\u00f4ng th\u1ee9c t\u00ednh t\u1ed5ng tr\u1edf c\u1ee7a c\u00e1c \u0111o\u1ea1n m\u1ea1ch ch\u1ec9 c\u00f3 hai trong ba lo\u1ea1i ph\u1ea7n t\u1eed: R, I, C m\u1eafc n\u1ed1i ti\u1ebfp.<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

+ Khi ch\u1ec9 c\u00f3 R v\u00e0 L t\u1ed5ng tr\u1edf :<\/p>\n

$\"\"$ <\/p>\n

+ Khi ch\u1ec9 c\u00f3 R v\u00e0 C t\u1ed5ng tr\u1edf :<\/p>\n

$\"\"$ <\/p>\n

+ Khi ch\u1ec9 c\u00f3 C v\u00e0 L t\u1ed5ng tr\u1edf:<\/p>\n

$\"\"$ <\/p>\n

C\u00e2u 2 (trang 156 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Cho f l\u00e0 t\u1ea7n s\u1ed1 d\u00f2ng \u0111i\u1ec7n. H\u00e3y t\u00ednh t\u1ed5ng tr\u1edf c\u1ee7a \u0111o\u1ea1n m\u1ea1ch<\/span><\/p>\n

– ch\u1ec9 c\u00f3 hai cu\u1ed9n c\u1ea3m thu\u1ea7n c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m L_{1<\/sub>,L_{2<\/sub>\u00a0m\u1eafc n\u1ed1i ti\u1ebfp.<\/p>\n}}

– ch\u1ec9 c\u00f3 hai t\u1ee5 \u0111i\u1ec7n c\u00f3 \u0111i\u1ec7n dung l\u00e0 C_{1<\/sub>,C_{2<\/sub>\u00a0m\u1eafc n\u1ed1i ti\u1ebfp.<\/p>\n}}

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

+ \u0110o\u1ea1n m\u1ea1ch ch\u1ec9 c\u00f3 hai cu\u1ed9n c\u1ea3m thu\u1ea7n c\u00f3 \u0111\u1ed9 t\u1ef1 c\u1ea3m l\u00e0 L_{1<\/sub>,L_{2<\/sub>\u00a0m\u1eafc n\u1ed1i ti\u1ebfp ta c\u00f3, n\u1ebfu c\u01b0\u1eddng \u0111\u1ed9 hi\u1ec7u d\u1ee5ng trong m\u1ea1ch l\u00e0 I th\u00ec \u0111i\u1ec7n \u00e1p hai \u0111\u1ea7u c\u00e1c cu\u1ed9n d\u00e2y l\u00e0 U_{1<\/sub>\u00a0= I.\u03c9L_{1<\/sub>\u00a0v\u00e0 U_{2<\/sub>\u00a0= I.\u03c9L_{2<\/sub>.<\/p>\n}}}}}}

V\u00ec ch\u00fang c\u00f9ng pha n\u00ean:<\/p>\n

U = U_{1<\/sub>\u00a0+ U_{2<\/sub>\u00a0= I.\u03c9L_{1<\/sub>\u00a0+ I.\u03c9L_{2<\/sub>\u00a0= I(\u03c9L_{1<\/sub>\u00a0+ \u03c9L_{2<\/sub>)<\/p>\n}}}}}}

T\u1ed5ng tr\u1edf m\u1ea1ch:<\/p>\n

$\"\u0110\u1ec3$ <\/p>\n

+ \u0110o\u1ea1n m\u1ea1ch ch\u1ec9 c\u00f3 hai t\u1ee5 \u0111i\u1ec7n m\u1eafc n\u1ed1i ti\u1ebfp c\u00f3 \u0111i\u1ec7n dung C_{1<\/sub>, C_{2<\/sub>. V\u00ec C_{1<\/sub>, C_{2<\/sub>\u00a0m\u1eafc n\u1ed1i ti\u1ebfp ta c\u00f3 \u0111i\u1ec7n dung t\u01b0\u01a1ng \u0111\u01b0\u01a1ng c\u1ee7a b\u1ed9 t\u1ee5 l\u00e0:<\/p>\n}}}}

$\"\u0110\u1ec3$ <\/p>\n

T\u1ed5ng tr\u1edf m\u1ea1ch:<\/p>\n

$\"\u0110\u1ec3$ <\/p>\n

C\u00e2u 3 (trang 157 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0N\u00eau \u0111i\u1ec1u ki\u1ec7n v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng \u0111i\u1ec7n \u0111\u1ed1i v\u1edbi \u0111o\u1ea1n m\u1ea1ch RLC n\u1ed1i ti\u1ebfp.<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Xem m\u1ee5c 5 ph\u1ea7n KTCB.<\/p>\n

B\u00c0I T\u1eacP<\/strong><\/p>\n

B\u00e0i 1 (trang 157 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Dung kh\u00e1ng c\u1ee7a m\u1ed9t \u0111o\u1ea1n m\u1ea1ch RLC n\u1ed1i ti\u1ebfp \u0111ang c\u00f3 gi\u00e1 tr\u1ecb nh\u1ecf h\u01a1n c\u1ea3m kh\u00e1ng. Ta l\u00e0m thay \u0111\u1ed5i ch\u1ec9 m\u1ed9t trong c\u00e1c th\u00f4ng s\u1ed1 c\u1ee7a \u0111o\u1ea1n m\u1ea1ch b\u1eb1ng c\u00e1c c\u1ea1ch n\u00eau sau \u0111\u00e2y, c\u00e1ch n\u00e0o c\u00f3 th\u1ec3 l\u00e0m cho hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng \u0111i\u1ec7n x\u1ea3y ra?<\/span><\/p>\n

A. t\u0103ng \u0111i\u1ec7n dung c\u1ee7a t\u1ee5 \u0111i\u1ec7n<\/p>\n

B. t\u0103ng h\u1ec7 s\u1ed1 t\u1ef1 c\u1ea3m c\u1ee7a cu\u1ed9n d\u00e2y.<\/p>\n

C. Gi\u1ea3m \u0111i\u1ec7n tr\u1edf c\u1ee7a \u0111o\u1ea1n m\u1ea1ch.<\/p>\n

D. Gi\u1ea3m t\u1ea7n s\u1ed1 d\u00f2ng \u0111i\u1ec7n.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn D<\/p>\n

Ta c\u00f3 dung kh\u00e1ng nh\u1ecf h\u01a1n c\u1ea3m kh\u00e1ng:<\/p>\n

$\"\"$ <\/p>\n

N\u1ebfu gi\u1ea3m t\u1ea7n s\u1ed1 th\u00ec:<\/p>\n

$\"\"$ <\/p>\n

C\u00f2n Z_{L<\/sub>\u00a0= 2\u03c0fL gi\u1ea3m cho t\u1edbi khi ch\u00fang b\u1eb1ng nhau Z_{L<\/sub>\u00a0= Z_{C<\/sub>\u00a0th\u00ec x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng.<\/p>\n}}}

B\u00e0i 2 (trang 157 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0\u0110i\u1ec7n \u00e1p gi\u1eefa hai \u0111\u1ea7u m\u1ed9t \u0111o\u1ea1n m\u1ea1ch RLC n\u1ed1i ti\u1ebfp s\u1edbm pha \u03c0\/4 so v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n. ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y \u0111\u00fang \u0111\u1ed1i v\u1edbi \u0111o\u1ea1n m\u1ea1ch n\u00e0y?<\/span><\/p>\n

A. T\u1ea7n s\u1ed1 d\u00f2ng \u0111i\u1ec7n trong \u0111o\u1ea1n m\u1ea1ch nh\u1ecf h\u01a1n gi\u00e1 tr\u1ecb c\u1ea7n \u0111\u1ec3 x\u1ea3y ra c\u1ed9ng h\u01b0\u1edfng.<\/p>\n

B. T\u1ed5ng tr\u1edf c\u1ee7a \u0111o\u1ea1n m\u1ea1ch b\u1eb1ng hau l\u1ea7n \u0111i\u1ec7n tr\u1edf R c\u1ee7a m\u1ea1ch.<\/p>\n

C. Hi\u1ec7u s\u1ed1 gi\u1eefa c\u1ea3m kh\u00e1ng v\u00e0 dung kh\u00e1ng b\u1eb1ng \u0111i\u1ec7n tr\u1edf thu\u1ea7n c\u1ee7a \u0111o\u1ea1n m\u1ea1ch.<\/p>\n

D. \u0110i\u1ec7n \u00e1p gi\u1eefa hai \u0111\u1ea7u \u0111i\u1ec7n tr\u1edf s\u1edbm pha \u03c0\/4 so v\u1edbi \u0111i\u1ec7n \u00e1p gi\u1eefa hai b\u1ea3n t\u1ee5 \u0111i\u1ec7n.<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

Ch\u1ecdn C<\/p>\n

Theo gi\u1ea3 thi\u1ebft \u03c6 = \u03c0\/4<\/p>\n

$\"\"$ <\/p>\n

\u21d2Z_{L<\/sub>\u00a0– Z_{C<\/sub>\u00a0= R<\/p>\n}}

B\u00e0i 3 (trang 157 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Cho \u0111o\u1ea1n m\u1ea1ch RLC n\u1ed1i ti\u1ebfp c\u00f3 R=50\u03a9; L = 159 mH, C = 31,8 \u03bcF. \u0110i\u1ec7n \u00e1p gi\u1eefa hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch c\u00f3 bi\u1ec3u th\u1ee9c u = 120cos100\u03c0t (V). t\u00ednh t\u1ed5ng tr\u1edf c\u1ee7a \u0111o\u1ea1n m\u1ea1ch v\u00e0 vi\u1ebft bi\u1ec3u th\u1ee9c c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n t\u1ee9c th\u1eddi qua \u0111o\u1ea1n m\u1ea1ch.<\/span><\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

T\u1eeb gi\u1ea3 thi\u1ebft : u = 120cos\u2061100\u03c0t (V) c\u00f3 th\u1ec3 suy ra: U_{0<\/sub>\u00a0= 120V; \u03c9 = 100\u03c0. C\u00f3 th\u1ec3 t\u00ednh dung kh\u00e1ng v\u00e0 c\u1ea3m kh\u00e1ng tr\u01b0\u1edbc khi t\u00ednh t\u1ed5ng tr\u1edf c\u1ee7a \u0111o\u1ea1n m\u1ea1ch.<\/p>\n}

Z_{L<\/sub>\u00a0= L\u03c9 = 50\u03a9; Z_{C<\/sub>\u00a0= 1\/\u03c9C = 100 \u03a9.<\/p>\n}}

V\u00ec v\u1eady :<\/p>\n

$\"\"$ <\/p>\n

B\u00e0i 4 (trang 157 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):<\/b>\u00a0Trong m\u1ed9t \u0111o\u1ea1n m\u1ea1ch xoay chi\u1ec1u RLC n\u1ed1i ti\u1ebfp, h\u1ec7 s\u1ed1 t\u1ef1 c\u1ea3m c\u1ee7a cu\u1eadn d\u00e2y l\u00e0 L = 0,1H; t\u1ee5 \u0111i\u1ec7n c\u00f3 \u0111i\u1ec7n dung C = 0,1\u03bcF; t\u1ea7n s\u1ed1 d\u00f2ng \u0111i\u1ec7n l\u00e0 f = 50Hz.<\/span><\/p>\n

a) H\u1ecfi d\u00f2ng \u0111i\u1ec7n trong \u0111o\u1ea1n m\u1ea1ch s\u1edbm pha hay tr\u1ec5 pha so v\u1edbi \u0111i\u1ec7n \u00e1p \u1edf hai \u0111\u1ea7u \u0111o\u1ea1n m\u1ea1ch?<\/p>\n

b) C\u1ea7n ph\u1ea7n thay t\u1ee5 \u0111i\u1ec7n n\u00f3i tr\u00ean b\u1edfi m\u1ed9t t\u1ee5 c\u00f3 \u0111i\u1ec7n dung C b\u1eb1ng nao nhi\u00eau \u0111\u1ec3 tr\u00ean \u0111o\u1ea1n m\u1ea1ch x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng \u0111i\u1ec7n?<\/p>\n

L\u1eddi gi\u1ea3i:<\/b><\/p>\n

a) \u00c1p d\u1ee5ng c\u00e1c c\u00f4ng th\u1ee9c cho \u0111o\u1ea1n m\u1ea1ch c\u00f3 R v\u00e0 C m\u1eafc n\u1ed1i ti\u1ebfp:<\/p>\n

Z_{L<\/sub>\u00a0= L\u03c9 = 10\u03c0 \u03a9;<\/p>\n}

$\"\u0110\u1ec3$ <\/p>\n

\u21d2 Z_{L<\/sub>\u00a0<Z_{C<\/sub>.<\/p>\n}}

V\u1eady i bi\u1ebfn thi\u00ean s\u1edbm pha so v\u1edbi u.<\/p>\n

\u0110\u1ec3 tr\u00ean \u0111o\u1ea1n m\u1ea1ch x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng c\u1ed9ng h\u01b0\u1edfng \u0111i\u1ec7n c\u1ea7n ph\u1ea3i thay t\u1ee5 \u0111i\u1ec7n n\u00f3i tr\u00ean b\u1edfi m\u1ed9t t\u1ee5 c\u00f3 \u0111i\u1ec7n dung C sao cho Z_{L<\/sub>\u00a0– Z_{C<\/sub>\u00a0= 0<\/p>\n}}

$\"\u0110\u1ec3$ <\/p>\n

Suy ra:<\/p>\n

$\"\u0110\u1ec3$ <\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U H\u1eceI C\u00e2u 1 (trang 156 sgk V\u1eadt L\u00ed 12 n\u00e2ng cao):\u00a0Vi\u1ebft c\u00f4ng th\u1ee9c t\u00ednh t\u1ed5ng tr\u1edf c\u1ee7a c\u00e1c \u0111o\u1ea1n m\u1ea1ch ch\u1ec9 c\u00f3 hai trong ba lo\u1ea1i ph\u1ea7n t\u1eed: R, I, C m\u1eafc n\u1ed1i ti\u1ebfp. L\u1eddi gi\u1ea3i: + Khi ch\u1ec9 c\u00f3 R v\u00e0 L t\u1ed5ng tr\u1edf : + Khi ch\u1ec9 c\u00f3 R v\u00e0 C t\u1ed5ng […]<\/p>\n","protected":false},"author":3,"featured_media":25112,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1304],"tags":[1434,1433],"yoast_head":"\nCh\u01b0\u01a1ng 5 - B\u00e0i 28: M\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp. 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L\u1eddi gi\u1ea3i: + Khi ch\u1ec9 c\u00f3 R v\u00e0 L t\u1ed5ng tr\u1edf : + Khi ch\u1ec9 c\u00f3 R v\u00e0 C t\u1ed5ng […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lop12.edu.vn\/chuong-5-bai-28-mach-co-r-l-c-mac-noi-tiep-cong-huong-dien\/\" \/>\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=\"2018-04-03T09:56:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/04\/1-27.png\" \/>\n\t<meta property=\"og:image:width\" content=\"298\" \/>\n\t<meta property=\"og:image:height\" content=\"42\" \/>\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=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/lop12.edu.vn\/chuong-5-bai-28-mach-co-r-l-c-mac-noi-tiep-cong-huong-dien\/\",\"url\":\"https:\/\/lop12.edu.vn\/chuong-5-bai-28-mach-co-r-l-c-mac-noi-tiep-cong-huong-dien\/\",\"name\":\"Ch\u01b0\u01a1ng 5 - B\u00e0i 28: M\u1ea1ch c\u00f3 R, L, C m\u1eafc n\u1ed1i ti\u1ebfp. 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