{"id":19335,"date":"2021-01-11T04:34:40","date_gmt":"2021-01-11T04:34:40","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=19335"},"modified":"2024-07-03T12:11:58","modified_gmt":"2024-07-03T05:11:58","slug":"dien-tro-cua-day-dan-phu-thuoc-vao-nhung-yeu-to-nao","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=19335","title":{"rendered":"\u0110i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn ph\u1ee5 thu\u1ed9c v\u00e0o nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0o?"},"content":{"rendered":"

\u0110i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh \u0111\u1ebfn d\u00f2ng \u0111i\u1ec7n trong c\u00f4ng th\u1ee9c t\u00ednh \u0111\u1ecbnh lu\u1eadt \u00d4m. V\u1eady \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn ph\u1ee5 thu\u1ed9c v\u00e0o nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0o?<\/strong> T\u1ea5t c\u1ea3 s\u1ebd \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p qua b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/span><\/p>\n

\"\u0110i\u1ec7n
\u0110i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn ph\u1ee5 thu\u1ed9c v\u00e0o nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0o?<\/span><\/figcaption><\/figure>\n

\u0110i\u1ec7n tr\u1edf l\u00e0 g\u00ec?<\/strong><\/span><\/h2>\n

\u0110i\u1ec7n tr\u1edf<\/a><\/strong> l\u00e0 s\u1ef1 c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n c\u1ee7a m\u1ed9t v\u1eadt d\u1eabn \u0111i\u1ec7n. N\u1ebfu m\u1ed9t v\u1eadt d\u1eabn \u0111i\u1ec7n t\u1ed1t th\u00ec \u0111i\u1ec7n tr\u1edf c\u1ee7a v\u1eadt \u0111\u00f3 nh\u1ecf. Ng\u01b0\u1ee3c l\u1ea1i, n\u1ebfu v\u1eadt d\u1eabn \u0111i\u1ec7n k\u00e9m th\u00ec \u0111i\u1ec7n tr\u1edf s\u1ebd l\u1edbn. \u0110i\u1ec3n h\u00ecnh l\u00e0 \u0111\u1ed1i v\u1edbi v\u1eadt c\u00e1ch \u0111i\u1ec7n th\u00ec c\u00f3 \u0111i\u1ec7n tr\u1edf v\u00f4 c\u00f9ng l\u1edbn.<\/span><\/p>\n

\u0110i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn ph\u1ee5 thu\u1ed9c v\u00e0o nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0o?<\/strong><\/span><\/h2>\n

C\u00f4ng th\u1ee9c t\u00ednh \u0111i\u1ec7n tr\u1edf c\u1ee7a m\u1ed9t v\u1eadt d\u1eabn \u0111i\u1ec7n nh\u01b0 sau:<\/span><\/p>\n

R = \u03c1.L\/S<\/strong><\/span><\/p>\n

Trong \u0111\u00f3:<\/span><\/p>\n

R<\/strong> l\u00e0 \u0111i\u1ec7n tr\u1edf (\u0110\u01a1n v\u1ecb: Ohm).<\/span><\/p>\n

\u03c1<\/strong> l\u00e0 \u0111i\u1ec7n tr\u1edf su\u1ea5t ph\u1ee5 thu\u1ed9c v\u00e0o ch\u1ea5t li\u1ec7u.<\/span><\/p>\n

L<\/strong> l\u00e0 chi\u1ec1u d\u00e0i d\u00e2y d\u1eabn.<\/span><\/p>\n

S<\/strong> l\u00e0 ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y d\u1eabn.<\/span><\/p>\n

T\u1eeb c\u00f4ng th\u1ee9c tr\u00ean, ta c\u00f3 th\u1ec3 th\u1ea5y s\u1ef1 ph\u1ee5 thu\u1ed9c \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y v\u00e0o 3 y\u1ebfu t\u1ed1: Ch\u1ea5t li\u1ec7u l\u00e0m d\u00e2y d\u1eabn, chi\u1ec1u d\u00e0i d\u00e2y d\u1eabn v\u00e0 ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y d\u1eabn.<\/span><\/p>\n

Ph\u1ee5 thu\u1ed9c v\u00e0o ch\u1ea5t li\u1ec7u l\u00e0m d\u00e2y d\u1eabn<\/span><\/h3>\n
\"S\u1ef1
S\u1ef1 ph\u1ee5 thu\u1ed9c c\u1ee7a \u0111i\u1ec7n tr\u1edf v\u00e0o ch\u1ea5t li\u1ec7u l\u00e0m d\u00e2y d\u1eabn<\/span><\/figcaption><\/figure>\n

S\u1ef1 ph\u1ee5 thu\u1ed9c c\u1ee7a \u0111i\u1ec7n tr\u1edf v\u00e0o ch\u1ea5t li\u1ec7u l\u00e0m d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c \u0111\u1eb7c tr\u01b0ng b\u1eb1ng m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u00f3 l\u00e0 <\/span>\u0111i\u1ec7n tr\u1edf su\u1ea5t<\/a><\/strong>.\u00a0<\/span><\/span><\/p>\n

\u0110i\u1ec7n tr\u1edf su\u1ea5t l\u00e0 m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng \u0111\u1eb7c tr\u01b0ng cho s\u1ef1 c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n theo chi\u1ec1u d\u00e0i v\u00e0 ti\u1ebft di\u1ec7n c\u1ee7a m\u1ed7i ch\u1ea5t. V\u1ec1 b\u1ea3n ch\u1ea5t, \u0111i\u1ec7n tr\u1edf su\u1ea5t ch\u00ednh l\u00e0 kh\u1ea3 n\u0103ng c\u1ea3n tr\u1edf s\u1ef1 d\u1ecbch chuy\u1ec3n theo h\u01b0\u1edbng c\u1ee7a c\u00e1c h\u1ea1t mang \u0111i\u1ec7n. Trong \u0111\u00f3, c\u00e1c v\u1eadt li\u1ec7u c\u00e1ch \u0111i\u1ec7n (Ch\u1ea5t c\u00f3 t\u00ednh c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n l\u1edbn) th\u01b0\u1eddng c\u00f3 \u0111i\u1ec7n tr\u1edf su\u1ea5t cao, ng\u01b0\u1ee3c l\u1ea1i v\u1edbi c\u00e1c v\u1eadt li\u1ec7u d\u1eabn \u0111i\u1ec7n (Ch\u1ea5t d\u1ec5 d\u00e0ng cho d\u00f2ng \u0111i\u1ec7n truy\u1ec1n qua) c\u00f3 \u0111i\u1ec7n tr\u1edf su\u1ea5t th\u1ea5p. \u0110\u01a1n v\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf su\u1ea5t l\u00e0 Ohm.met (\u03a9.m).<\/span><\/p>\n

S\u1ef1 ph\u1ee5 thu\u1ed9c c\u1ee7a \u0111i\u1ec7n tr\u1edf v\u00e0o chi\u1ec1u d\u00e0i d\u00e2y d\u1eabn<\/span><\/h3>\n

\u0110i\u1ec7n tr\u1edf c\u1ee7a c\u00e1c d\u00e2y d\u1eabn c\u00f3 c\u00f9ng ti\u1ebft di\u1ec7n v\u00e0 \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb c\u00f9ng m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u th\u00ec t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi chi\u1ec1u d\u00e0i c\u1ee7a c\u00e1c d\u00e2y d\u1eabn. V\u00ed d\u1ee5 ta c\u00f3 hai \u0111o\u1ea1n d\u00e2y d\u1eabn c\u00f3 c\u00f9ng ti\u1ebft di\u1ec7n v\u00e0 \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb c\u00f9ng m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u, c\u00f3 chi\u1ec1u d\u00e0i l\u00e0 L1 v\u00e0 L2 th\u00ec:<\/span><\/p>\n

R1<\/sub>\/R2<\/sub> = L1<\/sub>\/L2<\/sub><\/strong><\/span><\/p>\n

Trong \u0111\u00f3:<\/span><\/p>\n

R1<\/sub>, L1<\/sub> <\/strong>l\u00e0 \u0111i\u1ec7n tr\u1edf v\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a d\u00e2y d\u1eabn 1.<\/span><\/p>\n

R2<\/sub>, L2<\/sub> <\/strong>l\u00e0 \u0111i\u1ec7n tr\u1edf v\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a d\u00e2y d\u1eabn 2.<\/span><\/p>\n

S\u1ef1 ph\u1ee5 thu\u1ed9c c\u1ee7a \u0111i\u1ec7n tr\u1edf v\u00e0o ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y d\u1eabn<\/span><\/h3>\n
\"S\u1ef1
Ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y d\u1eabn<\/span><\/figcaption><\/figure>\n

\u0110i\u1ec7n tr\u1edf c\u1ee7a c\u00e1c d\u00e2y d\u1eabn c\u00f3 c\u00f9ng chi\u1ec1u d\u00e0i v\u00e0 \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb c\u00f9ng m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u th\u00ec t\u1ef7 l\u1ec7 ngh\u1ecbch v\u1edbi ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y d\u1eabn. V\u00ed d\u1ee5 ta c\u00f3 hai \u0111o\u1ea1n d\u00e2y d\u1eabn c\u00f3 c\u00f9ng chi\u1ec1u d\u00e0i v\u00e0 \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb c\u00f9ng m\u1ed9t lo\u1ea1i v\u1eadt li\u1ec7u, c\u00f3 ti\u1ebft di\u1ec7n l\u00e0 S1 v\u00e0 S2 th\u00ec:<\/span><\/p>\n

R1<\/sub>\/R2<\/sub> = S2<\/sub>\/S1<\/sub><\/strong><\/span><\/p>\n

Trong \u0111\u00f3:\u00a0<\/span><\/p>\n

R1<\/sub>, S1<\/sub><\/strong> l\u00e0 \u0111i\u1ec7n tr\u1edf v\u00e0 ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y d\u1eabn 1.<\/span><\/p>\n

R2<\/sub>, S2<\/sub><\/strong> l\u00e0 \u0111i\u1ec7n tr\u1edf v\u00e0 ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y d\u1eabn 2.<\/span><\/p>\n

\u0110\u1eb7c bi\u1ec7t, \u0111\u1ed1i v\u1edbi ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y d\u1eabn l\u00e0 h\u00ecnh tr\u00f2n, ta t\u00ednh theo c\u00f4ng th\u1ee9c:<\/span><\/p>\n

S = \u03c0*r2<\/sup> = \u03c0*d2<\/sup>\/4<\/strong><\/span><\/p>\n

Trong \u0111\u00f3:<\/span><\/p>\n

S<\/strong> l\u00e0 ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y d\u1eabn.<\/span><\/p>\n

r<\/strong> l\u00e0 b\u00e1n k\u00ednh c\u1ee7a d\u00e2y d\u1eabn.<\/span><\/p>\n

d<\/strong> l\u00e0 \u0111\u01b0\u1eddng k\u00ednh c\u1ee7a d\u00e2y d\u1eabn.<\/span><\/p>\n

Kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a d\u00e2y d\u1eabn c\u00f3 ti\u1ebft di\u1ec7n \u0111\u1ec1u \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c:<\/span><\/p>\n

m = D*S<\/strong><\/span><\/p>\n

Trong \u0111\u00f3:<\/span><\/p>\n

m<\/strong> l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng c\u1ee7a d\u00e2y d\u1eabn.<\/span><\/p>\n

D<\/strong> l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng ri\u00eang c\u1ee7a v\u1eadt li\u1ec7u l\u00e0m d\u00e2y d\u1eabn.<\/span><\/p>\n

S<\/strong> l\u00e0 ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y d\u1eabn.<\/span><\/p>\n

Xem th\u00eam:\u00a0T\u1ed5ng h\u1ee3p gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf v\u00e0 t\u1ee5 \u0111i\u1ec7n trong th\u1ef1c t\u1ebf<\/a><\/span><\/p><\/blockquote>\n

Tr\u00ean \u0111\u00e2y l\u00e0 chia s\u1ebb c\u1ee7a H\u1ecdc vi\u1ec7n iT.vn v\u1ec1 nh\u1eefng y\u1ebfu t\u1ed1 m\u00e0 \u0111i\u1ec7n tr\u1edf ph\u1ee5 thu\u1ed9c v\u00e0o. Hy v\u1ecdng nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y c\u00f3 th\u1ec3 gi\u00fap \u00edch cho b\u1ea1n trong qu\u00e1 tr\u00ecnh h\u1ecdc t\u1eadp v\u00e0 l\u00e0m vi\u1ec7c. N\u1ebfu c\u00f3 b\u1ea5t c\u1ee9 th\u1eafc m\u1eafc n\u00e0o th\u00ec h\u00e3y \u0111\u1ec3 l\u1ea1i b\u00ecnh lu\u1eadn ngay b\u00ean d\u01b0\u1edbi b\u00e0i vi\u1ebft n\u00e0y ho\u1eb7c inbox tr\u1ef1c ti\u1ebfp cho H\u1ecdc vi\u1ec7n iT.vn \u0111\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p t\u1ed1t nh\u1ea5t. Ch\u00fac b\u1ea1n th\u00e0nh c\u00f4ng!<\/span><\/p>\n

M\u1ecdi chi ti\u1ebft xin vui l\u00f2ng li\u00ean h\u1ec7:
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 <\/p>\n","protected":false},"excerpt":{"rendered":"

\u0110i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn l\u00e0 m\u1ed9t trong nh\u1eefng y\u1ebfu t\u1ed1 quy\u1ebft \u0111\u1ecbnh d\u00f2ng \u0111i\u1ec7n trong \u0111\u1ecbnh lu\u1eadt \u00d4m. V\u1eady \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn ph\u1ee5 thu\u1ed9c v\u00e0o nh\u1eefng y\u1ebfu t\u1ed1 n\u00e0o?<\/p>\n","protected":false},"author":95,"featured_media":19336,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[734],"tags":[245],"_links":{"self":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/19335"}],"collection":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/users\/95"}],"replies":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=19335"}],"version-history":[{"count":0,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/19335\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/media\/19336"}],"wp:attachment":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=19335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=19335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=19335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}