{"id":19373,"date":"2021-01-14T04:14:59","date_gmt":"2021-01-14T04:14:59","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=19373"},"modified":"2024-12-21T15:16:15","modified_gmt":"2024-12-21T08:16:15","slug":"dien-tro-dan-la-gi-tim-hieu-ve-dien-tro-dan","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=19373","title":{"rendered":"\u0110i\u1ec7n tr\u1edf d\u00e1n l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u v\u1ec1 \u0111i\u1ec7n tr\u1edf d\u00e1n"},"content":{"rendered":"

\u0110i\u1ec7n tr\u1edf l\u00e0 m\u1ed9t linh ki\u1ec7n v\u00f4 c\u00f9ng quen thu\u1ed9c trong \u0111i\u1ec7n t\u1eed c\u01a1 b\u1ea3n. Th\u1ebf nh\u01b0ng b\u1ea1n c\u00f3 bi\u1ebft \u0111i\u1ec7n tr\u1edf d\u00e1n l\u00e0 g\u00ec?<\/strong> N\u00f3 c\u00f3 \u0111i\u1ec3m kh\u00e1c bi\u1ec7t n\u00e0o so v\u1edbi \u0111i\u1ec7n tr\u1edf th\u00f4ng th\u01b0\u1eddng kh\u00f4ng? V\u00e0 l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u1ecdc \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e1n? T\u1ea5t c\u1ea3 s\u1ebd \u0111\u01b0\u1ee3c gi\u1ea3i \u0111\u00e1p chi ti\u1ebft qua b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/span><\/p>\n

\"\u0110i\u1ec7n
\u0110i\u1ec7n tr\u1edf d\u00e1n l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u v\u1ec1 \u0111i\u1ec7n tr\u1edf d\u00e1n<\/span><\/figcaption><\/figure>\n

\u0110i\u1ec7n tr\u1edf d\u00e1n l\u00e0 g\u00ec?<\/strong><\/span><\/h2>\n

\u0110\u1ec3 t\u00ecm hi\u1ec3u \u0111i\u1ec7n tr\u1edf d\u00e1n l\u00e0 g\u00ec, \u0111\u1ea7u ti\u00ean ch\u00fang ta h\u00e3y c\u00f9ng xem kh\u00e1i ni\u1ec7m \u0111i\u1ec7n tr\u1edf<\/strong><\/a>. \u0110i\u1ec7n tr\u1edf l\u00e0 m\u1ed9t linh ki\u1ec7n \u0111i\u1ec7n t\u1eed th\u1ee5 \u0111\u1ed9ng. Hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n th\u00ec \u0111i\u1ec7n tr\u1edf ch\u00ednh l\u00e0 s\u1ef1 c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n c\u1ee7a m\u1ed9t v\u1eadt d\u1eabn \u0111i\u1ec7n.\u00a0<\/span><\/p>\n

\u0110i\u1ec7n tr\u1edf d\u00e1n ch\u00ednh l\u00e0 m\u1ed9t con \u0111i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c d\u00e1n tr\u00ean b\u1ec1 m\u1eb7t bo m\u1ea1ch ch\u1ee7 (Mainboard). N\u00f3 \u0111\u01b0\u1ee3c g\u1eafn c\u1ed1 \u0111\u1ecbnh tr\u00ean b\u1ec1 m\u1eb7t Mainboard n\u00ean kh\u00f4ng th\u1ec3 th\u00e1o r\u1eddi.<\/span><\/p>\n

K\u00edch th\u01b0\u1edbc c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e1n<\/strong><\/span><\/h2>\n

K\u00edch th\u01b0\u1edbc v\u00e0 h\u00ecnh d\u00e1ng c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e1n \u0111\u1ec1u \u0111\u00e3 \u0111\u01b0\u1ee3c ti\u00eau chu\u1ea9n h\u00f3a v\u00e0 h\u1ea7u h\u1ebft tu\u00e2n theo c\u00e1c ti\u00eau chu\u1ea9n JEDEC.<\/span><\/p>\n

K\u00edch th\u01b0\u1edbc \u0111i\u1ec7n tr\u1edf d\u00e1n \u0111\u01b0\u1ee3c bi\u1ec3u th\u1ecb b\u1eb1ng m\u00e3 s\u1ed1, ch\u1ee9a c\u1ea3 chi\u1ec1u r\u1ed9ng v\u00e0 chi\u1ec1u cao c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e1n. \u0110\u01a1n v\u1ecb \u0111o c\u1ee7a m\u00e3 n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00ednh theo Inch ho\u1eb7c mm, m\u00e3 Inch \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u h\u01a1n. Tuy nhi\u00ean, k\u00edch th\u01b0\u1edbc th\u1ef1c t\u1ebf s\u1eed d\u1ee5ng \u0111\u01a1n v\u1ecb mm nhi\u1ec1u h\u01a1n.<\/span><\/p>\n

\"B\u1ea3ng
B\u1ea3ng li\u1ec7t k\u00ea k\u00edch th\u01b0\u1edbc v\u00e0 th\u00f4ng s\u1ed1 k\u1ef9 thu\u1eadt c\u1ee7a m\u1ed9t s\u1ed1 \u0111i\u1ec7n tr\u1edf d\u00e1n th\u00f4ng d\u1ee5ng<\/span><\/figcaption><\/figure>\n

C\u00e1ch \u0111\u1ecdc \u0111i\u1ec7n tr\u1edf d\u00e1n SMD chi ti\u1ebft nh\u1ea5t<\/h2>\n

Do \u0111i\u1ec7n tr\u1edf d\u00e1n c\u00f3 k\u00edch th\u01b0\u1edbc kh\u00e1 nh\u1ecf n\u00ean kh\u00f4ng \u0111\u1ee7 kh\u00f4ng gian \u0111\u1ec3 in c\u00e1c m\u00e3 d\u1ea3i m\u00e0u truy\u1ec1n th\u1ed1ng. V\u00ec v\u1eady n\u00ean ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng m\u00e3 m\u1edbi cho \u0111i\u1ec7n tr\u1edf d\u00e1n. M\u00e3 ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 m\u00e3 h\u1ec7 th\u1ed1ng ba v\u00e0 b\u1ed1n ch\u1eef s\u1ed1 v\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng do Electronic Industries Alliance (EIA) \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 EIA-96.<\/span><\/p>\n

1. Theo h\u1ec7 th\u1ed1ng ba v\u00e0 b\u1ed1n ch\u1eef s\u1ed1<\/span><\/h3>\n

Tr\u01b0\u1eddng h\u1ee3p 1: \u0110i\u1ec7n tr\u1edf d\u00e1n ba ch\u1eef s\u1ed1<\/strong><\/span><\/h4>\n

V\u1edbi \u0111i\u1ec7n tr\u1edf d\u00e1n ba ch\u1eef s\u1ed1, ng\u01b0\u1eddi ta \u0111\u1ecdc nh\u01b0 sau:<\/span><\/p>\n

    \n
  • Hai ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean:<\/strong> L\u00e0 gi\u00e1 tr\u1ecb th\u1ef1c c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e1n.<\/span><\/li>\n
  • Ch\u1eef s\u1ed1 th\u1ee9 ba:<\/strong> L\u00e0 s\u1ed1 m\u0169 c\u1ee7a m\u01b0\u1eddi (S\u1ed1 ch\u1eef s\u1ed1 0).<\/span><\/li>\n<\/ul>\n

    V\u00ed d\u1ee5: M\u1ed9t con \u0111i\u1ec7n tr\u1edf d\u00e1n c\u00f3 k\u00fd hi\u1ec7u l\u00e0 223. Gi\u00e1 tr\u1ecb c\u1ee7a con \u0111i\u1ec7n tr\u1edf n\u00e0y: 223 = 22 x 10^3 = 22 000 Ohm = 22K Ohm.<\/span><\/p>\n

    \"\u0110i\u1ec7n
    \u0110i\u1ec7n tr\u1edf d\u00e1n 3 s\u1ed1<\/figcaption><\/figure>\n

    L\u01b0u \u00fd: \u0110\u1ed1i v\u1edbi \u0111i\u1ec7n tr\u1edf d\u01b0\u1edbi 100 Ohm th\u00ec ng\u01b0\u1eddi ta s\u1ebd ghi ch\u1eef s\u1ed1 th\u1ee9 ba l\u00e0 0.<\/span><\/i><\/span><\/p>\n

    V\u00ed d\u1ee5: M\u1ed9t con \u0111i\u1ec7n tr\u1edf d\u00e1n d\u01b0\u1edbi 100 Ohm c\u00f3 k\u00fd hi\u1ec7u l\u00e0 100. Gi\u00e1 tr\u1ecb c\u1ee7a con \u0111i\u1ec7n tr\u1edf n\u00e0y: 100 = 10 x 10^0 = 10 Ohm.<\/span><\/p>\n

    Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p ng\u01b0\u1eddi ta ch\u1ec9 ghi hai ch\u1eef s\u1ed1 \u0111\u1ea7u c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e1n d\u01b0\u1edbi 100 Ohm \u0111\u1ec3 tr\u00e1nh nh\u1ea7m l\u1eabn.<\/span><\/p>\n

    \u0110\u1eb7c bi\u1ec7t, v\u1edbi \u0111i\u1ec7n tr\u1edf d\u00e1n d\u01b0\u1edbi 10 Ohm, ng\u01b0\u1eddi ta th\u00eam ch\u1eef \u201cR\u201d \u0111\u1ec3 \u0111\u00e1nh d\u1ea5u v\u1ecb tr\u00ed \u0111\u1eb7t d\u1ea5u th\u1eadp ph\u00e2n.<\/span><\/p>\n

    V\u00ed d\u1ee5: M\u1ed9t con \u0111i\u1ec7n tr\u1edf d\u00e1n d\u01b0\u1edbi 10 Ohm c\u00f3 k\u00fd hi\u1ec7u l\u00e0 R47. Gi\u00e1 tr\u1ecb c\u1ee7a con \u0111i\u1ec7n tr\u1edf n\u00e0y: R47 = 0,47 Ohm.<\/span><\/p>\n

    Tr\u01b0\u1eddng h\u1ee3p 2: \u0110i\u1ec7n tr\u1edf d\u00e1n b\u1ed1n ch\u1eef s\u1ed1<\/strong><\/span><\/h4>\n

    C\u00e1ch \u0111\u1ecdc \u0111i\u1ec7n tr\u1edf d\u00e1n 4 s\u1ed1 nh\u01b0 sau:<\/span><\/p>\n

      \n
    • Ba ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean:<\/strong> L\u00e0 gi\u00e1 tr\u1ecb th\u1ef1c c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e1n.<\/span><\/li>\n
    • Ch\u1eef s\u1ed1 th\u1ee9 t\u01b0:<\/strong> L\u00e0 s\u1ed1 m\u0169 c\u1ee7a m\u01b0\u1eddi (S\u1ed1 ch\u1eef s\u1ed1 0).<\/span><\/li>\n<\/ul>\n

      V\u00ed d\u1ee5: M\u1ed9t con \u0111i\u1ec7n tr\u1edf d\u00e1n c\u00f3 k\u00fd hi\u1ec7u l\u00e0 1001. Gi\u00e1 tr\u1ecb c\u1ee7a con \u0111i\u1ec7n tr\u1edf n\u00e0y: 1001 = 100 x 10^1 = 1000 Ohm = 1<\/span> KiloOhm (k\u2126).<\/span><\/span><\/p>\n

      \"\u0110i\u1ec7n
      \u0110i\u1ec7n tr\u1edf d\u00e1n 4 s\u1ed1<\/figcaption><\/figure>\n

      \u0110\u1eb7c bi\u1ec7t, \u0111\u1ed1i v\u1edbi nh\u1eefng \u0111i\u1ec7n tr\u1edf d\u00e1n c\u00f3 gi\u00e1 tr\u1ecb l\u1edbn h\u01a1n 1000 \u2126 th\u00ec \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u ch\u1eef K (T\u1ee9c KiloOhm). C\u00f2n \u0111\u1ed1i v\u1edbi nh\u1eefng \u0111i\u1ec7n tr\u1edf d\u00e1n l\u1edbn h\u01a1n 1000 000 \u2126 th\u00ec \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u ch\u1eef M (T\u1ee9c MegaOhm).<\/span><\/p>\n

      L\u01b0u \u00fd: C\u00e1c \u0111i\u1ec7n tr\u1edf ghi 000 ho\u1eb7c 0000 l\u00e0 \u0111i\u1ec7n tr\u1edf c\u00f3 gi\u00e1 tr\u1ecb b\u1eb1ng 0 Ohm.<\/span><\/em><\/p>\n

      2. Theo h\u1ec7 th\u1ed1ng EIA-96<\/span><\/h3>\n

      Theo s\u1ef1 c\u1ea3i ti\u1ebfn kh\u00f4ng ng\u1eebng, \u0111i\u1ec7n tr\u1edf d\u00e1n d\u1ea7n c\u00f3 \u0111\u1ed9 ch\u00ednh x\u00e1c cao h\u01a1n v\u1edbi k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n. Ch\u00ednh v\u00ec v\u1eady, c\u00e1ch \u0111\u1ecdc \u0111i\u1ec7n tr\u1edf d\u00e1n c\u0169ng d\u1ea7n c\u00f3 s\u1ef1 c\u1ea3i ti\u1ebfn nh\u1ea5t \u0111\u1ecbnh v\u00e0 h\u1ec7 th\u1ed1ng EIA-96 \u0111\u01b0\u1ee3c ra \u0111\u1eddi.\u00a0<\/span>Trong \u0111\u00f3, h\u1ec7 th\u1ed1ng EIA-96 \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean d\u00f2ng E96 v\u00e0 h\u01b0\u1edbng t\u1edbi nh\u1eefng \u0111i\u1ec7n tr\u1edf c\u00f3 sai s\u1ed1 1%.<\/span><\/span><\/p>\n

      \u0110\u00e2y l\u00e0 h\u1ec7 th\u1ed1ng m\u00e3 h\u00f3a m\u1edbi cho \u0111i\u1ec7n tr\u1edf SMD 1%, s\u1eed d\u1ee5ng 3 k\u00fd t\u1ef1:<\/span><\/p>\n

        \n
      • Hai ch\u1eef s\u1ed1 \u0111\u1ea7u ti\u00ean:<\/strong> Tra c\u1ee9u gi\u00e1 tr\u1ecb trong b\u1ea3ng m\u00e3 EIA-96, cho bi\u1ebft gi\u00e1 tr\u1ecb \u0111i\u1ec7n tr\u1edf.<\/span><\/li>\n
      • Ch\u1eef c\u00e1i th\u1ee9 ba:<\/strong> Cho bi\u1ebft s\u1ed1 nh\u00e2n.<\/span><\/li>\n<\/ul>\n

        B\u1ea1n c\u00f3 th\u1ec3 tra c\u1ee9u b\u1ea3ng m\u00e3 EIA-96 cho \u0111i\u1ec7n tr\u1edf SMD 1% b\u00ean d\u01b0\u1edbi:<\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
        M\u00e3<\/strong><\/span><\/td>\nGi\u00e1 tr\u1ecb<\/strong><\/span><\/td>\nM\u00e3<\/strong><\/span><\/td>\nGi\u00e1 tr\u1ecb<\/strong><\/span><\/td>\nM\u00e3<\/strong><\/span><\/td>\nGi\u00e1 tr\u1ecb<\/strong><\/span><\/td>\nM\u00e3<\/strong><\/span><\/td>\nGi\u00e1 tr\u1ecb<\/strong><\/span><\/td>\n<\/tr>\n
        01<\/span><\/td>\n100<\/span><\/td>\n25<\/span><\/td>\n178<\/span><\/td>\n49<\/span><\/td>\n316<\/span><\/td>\n73<\/span><\/td>\n562<\/span><\/td>\n<\/tr>\n
        02<\/span><\/td>\n102<\/span><\/td>\n26<\/span><\/td>\n182<\/span><\/td>\n50<\/span><\/td>\n324<\/span><\/td>\n74<\/span><\/td>\n576<\/span><\/td>\n<\/tr>\n
        03<\/span><\/td>\n105<\/span><\/td>\n27<\/span><\/td>\n187<\/span><\/td>\n51<\/span><\/td>\n332<\/span><\/td>\n75<\/span><\/td>\n590<\/span><\/td>\n<\/tr>\n
        04<\/span><\/td>\n107<\/span><\/td>\n28<\/span><\/td>\n191<\/span><\/td>\n52<\/span><\/td>\n340<\/span><\/td>\n76<\/span><\/td>\n604<\/span><\/td>\n<\/tr>\n
        05<\/span><\/td>\n110<\/span><\/td>\n29<\/span><\/td>\n196<\/span><\/td>\n53<\/span><\/td>\n348<\/span><\/td>\n77<\/span><\/td>\n619<\/span><\/td>\n<\/tr>\n
        06<\/span><\/td>\n113<\/span><\/td>\n30<\/span><\/td>\n200<\/span><\/td>\n54<\/span><\/td>\n357<\/span><\/td>\n78<\/span><\/td>\n634<\/span><\/td>\n<\/tr>\n
        07<\/span><\/td>\n115<\/span><\/td>\n31<\/span><\/td>\n205<\/span><\/td>\n55<\/span><\/td>\n365<\/span><\/td>\n79<\/span><\/td>\n649<\/span><\/td>\n<\/tr>\n
        08<\/span><\/td>\n118<\/span><\/td>\n32<\/span><\/td>\n210<\/span><\/td>\n56<\/span><\/td>\n374<\/span><\/td>\n80<\/span><\/td>\n665<\/span><\/td>\n<\/tr>\n
        09<\/span><\/td>\n121<\/span><\/td>\n33<\/span><\/td>\n215<\/span><\/td>\n57<\/span><\/td>\n383<\/span><\/td>\n81<\/span><\/td>\n681<\/span><\/td>\n<\/tr>\n
        10<\/span><\/td>\n124<\/span><\/td>\n34<\/span><\/td>\n221<\/span><\/td>\n58<\/span><\/td>\n392<\/span><\/td>\n82<\/span><\/td>\n698<\/span><\/td>\n<\/tr>\n
        11<\/span><\/td>\n127<\/span><\/td>\n35<\/span><\/td>\n226<\/span><\/td>\n59<\/span><\/td>\n402<\/span><\/td>\n83<\/span><\/td>\n715<\/span><\/td>\n<\/tr>\n
        12<\/span><\/td>\n130<\/span><\/td>\n36<\/span><\/td>\n232<\/span><\/td>\n60<\/span><\/td>\n412<\/span><\/td>\n84<\/span><\/td>\n732<\/span><\/td>\n<\/tr>\n
        13<\/span><\/td>\n133<\/span><\/td>\n37<\/span><\/td>\n237<\/span><\/td>\n61<\/span><\/td>\n422<\/span><\/td>\n85<\/span><\/td>\n750<\/span><\/td>\n<\/tr>\n
        14<\/span><\/td>\n137<\/span><\/td>\n38<\/span><\/td>\n243<\/span><\/td>\n62<\/span><\/td>\n432<\/span><\/td>\n86<\/span><\/td>\n768<\/span><\/td>\n<\/tr>\n
        15<\/span><\/td>\n140<\/span><\/td>\n39<\/span><\/td>\n249<\/span><\/td>\n63<\/span><\/td>\n442<\/span><\/td>\n87<\/span><\/td>\n787<\/span><\/td>\n<\/tr>\n
        16<\/span><\/td>\n143<\/span><\/td>\n40<\/span><\/td>\n255<\/span><\/td>\n64<\/span><\/td>\n453<\/span><\/td>\n88<\/span><\/td>\n806<\/span><\/td>\n<\/tr>\n
        17<\/span><\/td>\n147<\/span><\/td>\n41<\/span><\/td>\n261<\/span><\/td>\n65<\/span><\/td>\n464<\/span><\/td>\n89<\/span><\/td>\n825<\/span><\/td>\n<\/tr>\n
        18<\/span><\/td>\n150<\/span><\/td>\n42<\/span><\/td>\n267<\/span><\/td>\n66<\/span><\/td>\n475<\/span><\/td>\n90<\/span><\/td>\n845<\/span><\/td>\n<\/tr>\n
        19<\/span><\/td>\n154<\/span><\/td>\n43<\/span><\/td>\n274<\/span><\/td>\n67<\/span><\/td>\n487<\/span><\/td>\n91<\/span><\/td>\n866<\/span><\/td>\n<\/tr>\n
        20<\/span><\/td>\n158<\/span><\/td>\n44<\/span><\/td>\n280<\/span><\/td>\n68<\/span><\/td>\n499<\/span><\/td>\n92<\/span><\/td>\n887<\/span><\/td>\n<\/tr>\n
        21<\/span><\/td>\n162<\/span><\/td>\n45<\/span><\/td>\n287<\/span><\/td>\n69<\/span><\/td>\n511<\/span><\/td>\n93<\/span><\/td>\n909<\/span><\/td>\n<\/tr>\n
        22<\/span><\/td>\n165<\/span><\/td>\n46<\/span><\/td>\n294<\/span><\/td>\n70<\/span><\/td>\n523<\/span><\/td>\n94<\/span><\/td>\n931<\/span><\/td>\n<\/tr>\n
        23<\/span><\/td>\n169<\/span><\/td>\n47<\/span><\/td>\n301<\/span><\/td>\n71<\/span><\/td>\n536<\/span><\/td>\n95<\/span><\/td>\n953<\/span><\/td>\n<\/tr>\n
        24<\/span><\/td>\n174<\/span><\/td>\n48<\/span><\/td>\n309<\/span><\/td>\n72<\/span><\/td>\n549<\/span><\/td>\n96<\/span><\/td>\n976<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        B\u1ea3ng tra ch\u1eef c\u00e1i th\u1ee9 ba c\u1ee7a \u0111i\u1ec7n tr\u1edf SMD:<\/span><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
        M\u00e3<\/strong><\/span><\/td>\nGi\u00e1 tr\u1ecb<\/strong><\/span><\/td>\n<\/tr>\n
        Z<\/span><\/td>\n0.001<\/span><\/td>\n<\/tr>\n
        Y ho\u1eb7c R<\/span><\/td>\n0.01<\/span><\/td>\n<\/tr>\n
        X ho\u1eb7c S<\/span><\/td>\n0.1<\/span><\/td>\n<\/tr>\n
        A<\/span><\/td>\n1<\/span><\/td>\n<\/tr>\n
        B ho\u1eb7c H<\/span><\/td>\n10<\/span><\/td>\n<\/tr>\n
        C<\/span><\/td>\n100<\/span><\/td>\n<\/tr>\n
        D<\/span><\/td>\n1000<\/span><\/td>\n<\/tr>\n
        E<\/span><\/td>\n10000<\/span><\/td>\n<\/tr>\n
        F<\/span><\/td>\n100000<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

        D\u1ef1a v\u00e0o b\u1ea3ng tr\u00ean, ta \u0111\u1ecdc gi\u00e1 tr\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf d\u00e1n nh\u01b0 sau: \u0110\u1ea7u ti\u00ean, ta \u0111\u1ecdc gi\u00e1 tr\u1ecb th\u1ef1c c\u1ee7a \u0111i\u1ec7n tr\u1edf theo m\u00e3 \u1edf ph\u00eda b\u00ean tr\u00e1i. Sau \u0111\u00f3, ta \u0111\u1ed1i chi\u1ebfu k\u00fd t\u1ef1 \u1edf b\u1ea3ng b\u00ean ph\u1ea3i \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh h\u1ec7 s\u1ed1 nh\u00e2n.<\/span><\/p>\n

        V\u00ed d\u1ee5:<\/strong><\/span><\/p>\n

        01Y: 100 x 0,01 = 1\u03a9<\/span><\/p>\n

        68X: 499 x 0,1 = 49,9\u03a9<\/span><\/p>\n

        76X: 604 x 0,1 = 60,4\u03a9<\/span><\/p>\n

        01A: 100 x 1 = 100\u03a9<\/span><\/p>\n

        29B: 196 x 10 = 1,96k\u03a9<\/span><\/p>\n

        01C: 100 x 100 = 10k\u03a9<\/span><\/p>\n

        L\u01b0u \u00fd:<\/span><\/em><\/span><\/p>\n