Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
Cu\u1ed9c s\u1ed1ng h\u1eb1ng ng\u00e0y c\u1ee7a ch\u00fang ta kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111i s\u1ef1 c\u00f3 m\u1eb7t c\u1ee7a d\u00e2y d\u1eabn \u0111i\u1ec7n. D\u00e2y \u0111i\u1ec7n \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n c\u1ee7a cu\u1ed9c s\u1ed1ng. Tuy nhi\u00ean, kh\u00f4ng ph\u1ea3i ai c\u0169ng hi\u1ec3u v\u1ec1 s\u1ef1 v\u1eadn h\u00e0nh c\u1ee7a d\u00e2y \u0111i\u1ec7n c\u0169ng nh\u01b0 nh\u1eefng y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn d\u00f2ng \u0111i\u1ec7n. Nh\u1eefng c\u00e2u h\u1ecfi xoay quanh d\u00e2y d\u1eabn nh\u01b0 \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn \u0111\u1ecbnh lu\u1eadt \u00f4m l\u00e0 g\u00ec v\u1eabn \u0111\u01b0\u1ee3c \u0111\u1eb7t ra. B\u00e0i vi\u1ebft ng\u00e0y h\u00f4m nay, ch\u00fang ta h\u00e3y c\u00f9ng nhau t\u00ecm hi\u1ec3u v\u00e0 gi\u1ea3i \u0111\u00e1p v\u1ec1 d\u00e2y d\u1eabn v\u00e0 \u0111\u1ecbnh lu\u1eadt \u00f4m nh\u00e9!<\/p>\n\n\n\n
\u0110i\u1ec7n tr\u1edf l\u00e0 g\u00ec?<\/p>\n\n\n\n
Ch\u00fang ta \u0111\u00e3 \u0111\u01b0\u1ee3c nghe r\u1ea5t nhi\u1ec1u v\u1ec1 \u0111i\u1ec7n trong cu\u1ed9c s\u1ed1ng th\u01b0\u1eddng ng\u00e0y. Tuy nhi\u00ean nh\u1eefng c\u00e1i ch\u00fang ta \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn ch\u1ec9 l\u00e0 d\u00f2ng \u0111i\u1ec7n th\u00f4ng th\u01b0\u1eddng. Kh\u00e1i ni\u1ec7m v\u1ec1 \u0111i\u1ec7n tr\u1edf l\u00e0 g\u00ec v\u1eabn c\u00f2n l\u00e0 c\u00e2u h\u1ecfi c\u1ee7a nhi\u1ec1u b\u1ea1n. Tr\u01b0\u1edbc khi \u0111\u1ebfn v\u1edbi \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00f2ng \u0111i\u1ec7n, ch\u00fang ta c\u1ea7n hi\u1ec3u \u0111i\u1ec7n tr\u1edf l\u00e0 g\u00ec? \u0110i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng v\u1eadt l\u00fd. \u0110\u1ea1i l\u01b0\u1ee3ng n\u00e0y l\u00e0 bi\u1ec3u tr\u01b0ng cho kh\u1ea3 n\u0103ng c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n c\u1ee7a v\u1eadt li\u1ec7u. Hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, \u0111i\u1ec7n tr\u1edf ch\u00ednh l\u00e0 kh\u1ea3 n\u0103ng c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u c\u1ee5 th\u1ec3.<\/p>\n\n\n\n
\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a \u0111i\u1ec7n tr\u1edf<\/p>\n\n\n\n
C\u00e1c v\u1eadt c\u1ee5 th\u1ec3 c\u00f3 nh\u1eefng v\u1eadt c\u00f3 kh\u1ea3 n\u0103ng d\u1eabn \u0111i\u1ec7n t\u1ed1t, d\u1eabn \u0111i\u1ec7n kh\u00f4ng t\u1ed1t. \u0110\u1ed1i v\u1edbi v\u1eadt d\u1eabn \u0111i\u1ec7n t\u1ed1t th\u00ec \u0111i\u1ec7n tr\u1edf c\u1ee7a v\u1eadt s\u1ebd nh\u1ecf h\u01a1n. Ng\u01b0\u1ee3c l\u1ea1i, v\u1eadt d\u1eabn \u0111i\u1ec7n kh\u00f4ng t\u1ed1t th\u00ec \u0111i\u1ec7n tr\u1edf l\u1edbn h\u01a1n. T\u00f9y v\u00e0o ch\u1ea5t li\u1ec7u c\u1ee7a v\u1eadt m\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a \u0111i\u1ec7n tr\u1edf c\u00f3 s\u1ef1 kh\u00e1c nhau. Nh\u1eefng v\u1eadt li\u1ec7u nh\u01b0 gi\u1ea5y, v\u1ea3i, len kh\u00f4ng c\u00f3 kh\u1ea3 n\u0103ng d\u1eabn \u0111i\u1ec7n. Th\u00ec \u0111i\u1ec7n tr\u1edf c\u1ee7a nh\u1eefng v\u1eadt n\u00e0y b\u1eb1ng kh\u00f4ng. Ch\u1ec9 nh\u1eefng v\u1eadt c\u00f3 th\u1ec3 d\u1eabn \u0111i\u1ec7n m\u1edbi c\u00f3 s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a \u0111i\u1ec7n tr\u1edf.<\/p>\n\n\n\n
\u0110\u1eb7c \u0111i\u1ec3m c\u1ee7a \u0111i\u1ec7n tr\u1edf<\/p>\n\n\n\n
\u0110i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn \u0111\u1ecbnh lu\u1eadt \u00f4m c\u0169ng \u0111\u01b0\u1ee3c xu\u1ea5t ph\u00e1t t\u1eeb \u0111\u1ecbnh ngh\u0129a c\u01a1 b\u1ea3n n\u00e0y. Trong cu\u1ed9c s\u1ed1ng th\u01b0\u1eddng ng\u00e0y, \u0111i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng nh\u01b0 m\u1ed9t linh ki\u1ec7n \u0111i\u1ec7n t\u1eed. Linh ki\u1ec7n n\u00e0y \u0111\u01b0\u1ee3c l\u1eafp v\u00e0o d\u00e2y n\u1ed1i th\u1ee5 \u0111\u1ed9ng. \u0110i\u1ec7n tr\u1edf bao g\u1ed3m 2 \u0111i\u1ec3m ti\u1ebfp n\u1ed1i v\u1edbi d\u00f2ng \u0111i\u1ec7n. Linh ki\u1ec7n n\u00e0y \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t v\u00e0o c\u00e1c m\u1ea1ch \u0111i\u1ec7n nh\u1eb1m ki\u1ec3m so\u00e1t d\u00f2ng \u0111i\u1ec7n c\u1ee7a m\u1ea1ch ch\u00ednh. Hay n\u00f3i m\u1ed9t c\u00e1ch c\u1ee5 th\u1ec3, th\u00ec \u0111i\u1ec7n tr\u1edf ki\u1ec3m so\u00e1t c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n \u0111i qua n\u00f3 trong m\u1ea1ch ch\u00ednh. \u0110i\u1ec7n tr\u1edf h\u1ed7 tr\u1ee3 \u0111i\u1ec1u ch\u1ec9nh m\u1ee9c \u0111\u1ed9 t\u00edn hi\u1ec7u.<\/p>\n\n\n\n
\u0110\u01a1n v\u1ecb \u0111o c\u1ee7a \u0111i\u1ec7n tr\u1edf? \u1ee8ng d\u1ee5ng<\/p>\n\n\n\n
\u0110i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u trong c\u00e1c linh ki\u1ec7n th\u1ee5 \u0111\u1ed9ng kh\u00e1c nh\u01b0 transistor. H\u1ea7u h\u1ebft nh\u1eefng linh ki\u1ec7n \u0111i\u1ec7n t\u1eed \u0111\u1ec1u c\u00f3 \u0111i\u1ec7n tr\u1edf. \u0110i\u1ec1u n\u00e0y s\u1ebd gi\u00fap c\u00e1c linh ki\u1ec7n n\u00e0y khi l\u1eafp v\u00e0o b\u1ed9 m\u00e1y chung c\u00f3 th\u1ec3 th\u00edch h\u1ee3p v\u1edbi d\u00f2ng \u0111i\u1ec7n. \u0110i\u1ec7n tr\u1edf nh\u1eb1m \u0111\u1ea3m b\u1ea3o s\u1ef1 \u1ed5n \u0111\u1ecbnh d\u00f2ng \u0111i\u1ec7n \u0111i quay d\u00e2y d\u1eabn v\u00e0 v\u1eadt d\u1eabn.<\/p>\n\n\n\n
\u0110\u01a1n v\u1ecb \u0111o \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn l\u00e0 Ohm \u0111\u1ecdc l\u00e0 \u00d4m. Trong c\u00e1c b\u00e0i t\u1eadp tr\u00ean l\u1edbp c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ebfn \u0111\u01a1n v\u1ecb n\u00e0y r\u1ea5t nhi\u1ec1u. K\u00ed hi\u1ec7u trong c\u00e1c b\u00e0i t\u1eadp n\u00e0y l\u00e0 \u03a9. Tr\u00ean th\u1ef1c t\u1ebf c\u00f3 nhi\u1ec1u \u0111\u01a1n v\u1ecb d\u00f9ng \u0111\u1ec3 \u0111o \u0111i\u1ec7n tr\u1edf. Tuy nhi\u00ean c\u00e1c \u0111\u01a1n v\u1ecb \u0111o n\u00e0y \u0111\u1ec1u c\u00f3 th\u1ec3 quy \u0111\u1ed5i cho nhau. N\u1ebfu \u0111\u1ec1 b\u00e0i kh\u00f4ng cho \u0111\u01a1n v\u1ecb \u0111o l\u00e0 \u03a9, th\u00ec c\u00e1c em c\u1ea7n \u0111\u1ed5i v\u1ec1 \u0111\u01a1n v\u1ecb n\u00e0y \u0111\u1ec3 t\u00ednh.<\/p>\n\n\n\n
M\u1ed9t ohm \u0111i\u1ec7n tr\u1edf xu\u1ea5t hi\u1ec7n khi: d\u00f2ng \u0111i\u1ec7n c\u00f3 c\u01b0\u1eddng \u0111\u1ed9 m\u1ed9t ampe ch\u1ea1y qua \u0111i\u1ec7n tr\u1edf c\u00f3 \u0111i\u1ec7n tr\u1edf gi\u1ea3m m\u1ed9t V\u00f4n (V) qua c\u00e1c \u0111\u1ea7u n\u1ed1i c\u1ee7a n\u00f3. D\u00f2ng \u0111i\u1ec7n t\u1ec9 l\u1ec7 v\u1edbi hi\u1ec7u \u0111i\u1ec7n th\u1ebf tr\u00ean hai \u0111\u1ea7u c\u1ef1c. \u0110\u00e2y ch\u00ednh l\u00e0 \u0111\u1eb7c \u0111i\u1ec3m chung \u0111i\u1ec7n tr\u1edf. C\u00e1c em n\u00ean ghi nh\u1edb \u0111\u1eb7c \u0111i\u1ec3m n\u00e0y.<\/p>\n\n\n\n
K\u00fd hi\u1ec7u \u0111i\u1ec7n tr\u1edf<\/p>\n\n\n\n
\u0110i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn l\u00e0 g\u00ec?<\/p>\n\n\n\n
Sau khi ch\u00fang ta hi\u1ec3u v\u1ec1 ki\u1ebfn th\u1ee9c chung, ch\u00fang ta s\u1ebd \u0111\u1ebfn v\u1edbi \u0111\u1ecbnh ngh\u0129a \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn \u0111\u1ecbnh lu\u1eadt \u00f4m. \u0110i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn l\u00e0 \u0111i\u1ec7n tr\u1edf c\u1ee7a ch\u00ednh d\u00e2y d\u1eabn \u0111\u00f3 ch\u1ee9 kh\u00f4ng qua b\u1ea5t c\u1ee9 linh ki\u1ec7n n\u00e0y. M\u1ed7i ch\u1ea5t li\u1ec7u \u0111\u1ec3 l\u00e0m d\u00e2y d\u1eabn \u0111\u1ec1u c\u00f3 \u0111i\u1ec7n tr\u1edf kh\u00e1c nhau. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, \u0111i\u1ec7n tr\u1edf d\u00e2y d\u1eabn ch\u1ec9 \u0111\u1eb7c tr\u01b0ng t\u00ednh ch\u1ea5t c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n. \u0110i\u1ec7n tr\u1edf n\u00e0y c\u00f3 t\u1ef7 l\u1ec7 thu\u1eadn v\u1edbi chi\u1ec1u d\u00e0i d\u00e2y v\u00e0 \u0111i\u1ec7n tr\u1edf su\u1ea5t c\u1ee7a d\u00e2y d\u1eabn.<\/p>\n\n\n\n
Ng\u01b0\u1ee3c l\u1ea1i, \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn t\u1ec9 l\u1ec7 ngh\u1ecbch v\u1edbi ti\u1ebft di\u1ec7n d\u00e2y. \u0110i\u1ec1u n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00e1c nh\u00e0 v\u1eadt l\u00fd h\u1ecdc l\u00e0m th\u00ed nghi\u1ec7m v\u00e0 \u0111\u01b0a ra k\u1ebft lu\u1eadn. C\u00e1c em kh\u00f4ng th\u1ec3 t\u1ef1 m\u00ecnh minh ch\u1ee9ng \u0111i\u1ec1u n\u00e0y. Ch\u00ednh v\u00ec v\u1eady, vi\u1ec7c c\u1ee7a ch\u00fang ta l\u00e0 ghi nh\u1eadn k\u1ebft qu\u1ea3 v\u00e0 s\u1eed d\u1ee5ng trong c\u00e1c b\u00e0i t\u1eadp th\u01b0\u1eddng ng\u00e0y. \u0110i\u1ec1u n\u00e0y \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn \u0111\u1ed9 l\u1edbn c\u1ee7a \u0111i\u1ec7n tr\u1edf. C\u00f4ng th\u1ee9c \u0111\u1ec3 t\u00ednh \u0111i\u1ec7n tr\u1edf c\u0169ng li\u00ean quan \u0111\u1ebfn c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y.<\/p>\n\n\n\n
C\u00f4ng th\u1ee9c t\u00ednh \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn \u0111\u1ecbnh lu\u1eadt \u00d4m<\/p>\n\n\n\n
\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n tr\u1edf trong t\u1eebng lo\u1ea1i d\u00e2y d\u1eabn, ch\u00fang ta c\u1ea7n \u0111\u1ebfn c\u00f4ng th\u1ee9c t\u00ednh \u0111i\u1ec7n tr\u1edf. C\u00f4ng th\u1ee9c t\u00ednh \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn nh\u01b0 sau: R = (L x p)\/S.<\/p>\n\n\n\n
Trong \u0111\u00f3:<\/p>\n\n\n\n
R ch\u00ednh l\u00e0 k\u00ed hi\u1ec7u \u0111\u1ed9 l\u1edbn c\u1ee7a \u0111i\u1ec7n tr\u1edf trong d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c t\u00ednh. \u0110\u01a1n v\u1ecb c\u1ee7a R l\u00e0 \u00d4m k\u00ed hi\u1ec7u l\u00e0 \u03a9.<\/p>\n\n\n\n
L ch\u00ednh l\u00e0 chi\u1ec1u d\u00e0i c\u1ee7a d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c t\u00ednh. Nh\u01b0 ch\u00fang ta \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn ph\u00eda tr\u00ean. \u0110i\u1ec7n tr\u1edf t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi chi\u1ec1u d\u00e0i d\u00e2y. Ch\u00ednh v\u00ec v\u1eady, d\u00e2y c\u00e0ng d\u00e0i th\u00ec \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y c\u00e0ng l\u1edbn. \u0110\u01a1n v\u1ecb c\u1ee7a chi\u1ec1u d\u00e0i d\u00e2y l\u00e0 m.<\/p>\n\n\n\n
p l\u00e0 \u0111i\u1ec7n tr\u1edf su\u1ea5t (c\u00f2n g\u1ecdi l\u00e0 su\u1ea5t \u0111i\u1ec7n tr\u1edf ho\u1eb7c \u0111i\u1ec7n tr\u1edf ri\u00eang). N\u00f3 l\u00e0 th\u01b0\u1edbc \u0111o kh\u1ea3 n\u0103ng c\u1ea3n tr\u1edf l\u1ea1i d\u00f2ng \u0111i\u1ec7n c\u1ee7a v\u1eadt li\u1ec7u. \u0110i\u1ec7n tr\u1edf su\u1ea5t c\u1ee7a m\u1ed9t d\u00e2y d\u1eabn c\u00f3 chi\u1ec1u d\u00e0i 1m v\u1edbi ti\u1ebft di\u1ec7n 1 mm\u00b2, \u0111\u1eb7c tr\u01b0ng cho v\u1eadt li\u1ec7u d\u00e2y d\u1eabn.<\/p>\n\n\n\n
S l\u00e0 di\u1ec7n t\u00edch, ti\u1ebft di\u1ec7n c\u1ee7a d\u00e2y. Di\u1ec7n t\u00edch n\u00e0y \u0111\u01b0\u1ee3c t\u00ednh theo m\u1eb7t c\u1eaft c\u1ee7a d\u00e2y \u0111\u01b0\u1ee3c t\u00ednh \u0111i\u1ec7n tr\u1edf. \u0110\u01a1n v\u1ecb c\u1ee7a di\u1ec7n t\u00edch l\u00e0 m2.<\/p>\n\n\n\n
\u0110i\u1ec7n tr\u1edf l\u00e0 g\u00ec?<\/p>\n\n\n\n
V\u1edbi ch\u1ee7 \u0111\u1ec1 n\u00e0y, c\u00e1c em s\u1ebd g\u1eb7p r\u1ea5t nhi\u1ec1u nh\u1eefng b\u00e0i t\u1eadp t\u00ednh to\u00e1n li\u00ean quan. C\u00e1c em n\u00ean ghi nh\u1edb c\u00f4ng th\u1ee9c t\u00ednh \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn \u0111\u1ecbnh lu\u1eadt \u00f4m. \u0110\u00e2y s\u1ebd l\u00e0 c\u00f4ng c\u1ee5 gi\u00fap c\u00e1c em gi\u1ea3i \u0111\u00e1p t\u00ednh to\u00e1n nh\u1eefng b\u00e0i t\u1eadp li\u00ean quan. C\u00f3 th\u1ec3 \u0111\u1ec1 b\u00e0i ch\u01b0a cho s\u1eb5n c\u00e1c s\u1ed1 li\u1ec7u n\u00e0y. C\u00e1c em c\u1ea7n ph\u1ea3i t\u00ednh to\u00e1n \u0111\u1ea7y \u0111\u1ee7 c\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng n\u00e0y sau \u0111\u00f3 m\u1edbi c\u00f3 th\u1ec3 l\u1eafp v\u00e0o c\u00f4ng th\u1ee9c.<\/p>\n\n\n\n
\u0110\u1ecbnh lu\u1eadt \u00d4m<\/p>\n\n\n\n
\u0110\u1ecbnh lu\u1eadt \u00d4m \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ch\u1ea1y qua d\u00e2y d\u1eabn t\u1ec9 l\u1ec7 thu\u1eadn v\u1edbi hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u0111\u1eb7t v\u00e0o hai \u0111\u1ea7u d\u00e2y v\u00e0 t\u1ec9 l\u1ec7 ngh\u1ecbch v\u1edbi \u0111i\u1ec7n tr\u1edf. Bi\u1ec3u th\u1ee9c c\u1ee7a \u0111\u1ecbnh lu\u1eadt n\u00e0y nh\u01b0 sau: I = U\/R. C\u00e1c em c\u00f3 th\u1ec3 bi\u1ebfn \u0111\u1ed5i c\u00f4ng th\u1ee9c n\u00e0y \u0111\u1ec3 t\u00ednh to\u00e1n nh\u1eefng \u0111\u1ea1i l\u01b0\u1ee3ng c\u00f2n thi\u1ebfu. \u0110\u00e2y ch\u1ec9 l\u00e0 c\u00f4ng th\u1ee9c g\u1ed1c theo \u0111\u1ecbnh l\u00fd \u00f4m.<\/p>\n\n\n\n
Trong \u0111\u00f3 I ch\u00ednh l\u00e0 k\u00ed hi\u1ec7u, \u0111\u1ed9 l\u1edbn c\u1ee7a c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n c\u00f3 trong m\u1ea1ch \u0111i\u1ec7n. \u0110\u01a1n v\u1ecb c\u1ee7a I l\u00e0 ampe k\u00ed hi\u1ec7u l\u00e0 A. U l\u00e0 hi\u1ec7u \u0111i\u1ec7n th\u1ebf \u0111\u1eb7t v\u00e0o hay \u0111\u1ea7u c\u1ee7a d\u00e2y d\u1eabn. \u0110\u01a1n v\u1ecb c\u1ee7a U l\u00e0 v\u00f4n k\u00fd hi\u1ec7u l\u00e0 V\u00f4n. R l\u00e0 \u0111i\u1ec7n tr\u1edf. \u0110\u01a1n v\u1ecb c\u1ee7a \u0111i\u1ec7n tr\u1edf l\u00e0 \u00d4m k\u00fd hi\u1ec7u l\u00e0 \u03a9.<\/p>\n\n\n\n
B\u00e0i t\u1eadp v\u1ec1 \u0111\u1ecbnh lu\u1eadt \u00f4m<\/p>\n\n\n\n
\u0110\u1ecbnh lu\u1eadt \u00f4m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u trong c\u00e1c b\u00e0i t\u1eadp c\u1ee7a c\u00e1c em. Khi c\u00e1c em l\u00e0m nh\u1eefng b\u00e0i t\u1eadp li\u00ean quan \u0111\u1ebfn m\u1ea1ch \u0111i\u1ec7n th\u00ec c\u00f4ng th\u1ee9c n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng. Th\u1ea7y c\u00f4 tr\u00ean l\u1edbp s\u1ebd ch\u1ec9 cho c\u00e1c em c\u00e1ch v\u1eadn d\u1ee5ng v\u00e0o t\u1eebng b\u00e0i h\u1ecdc. \u0110\u1ed1i v\u1edbi \u0111\u1ecbnh lu\u1eadt \u00d4m vi\u1ec7c x\u00e1c \u0111\u1ecbnh \u0111i\u1ec7n tr\u1edf s\u1ebd d\u1ec5 d\u00e0ng h\u01a1n so v\u1edbi c\u00f4ng th\u1ee9c tr\u00ean. Tuy nhi\u00ean, s\u1ebd c\u00f3 nh\u1eefng b\u00e0i c\u00e1c em ph\u1ea3i s\u1eed d\u1ee5ng c\u00f4ng th\u1ee9c tr\u00ean thay v\u00ec c\u00f4ng th\u1ee9c c\u1ee7a \u0111\u1ecbnh lu\u1eadt n\u00e0y. C\u00e1c em h\u00e3y \u0111\u1ecdc \u0111\u1ec1 b\u00e0i v\u00e0 x\u00e1c \u0111\u1ecbnh c\u00f4ng th\u1ee9c c\u1ea7n d\u00f9ng. Tr\u00e1nh b\u1ecb nh\u1ea7m l\u1eabn gi\u1eefa c\u00e1c d\u1ea1ng b\u00e0i v\u1edbi nhau.<\/p>\n\n\n\n
C\u00f3 th\u1ec3 n\u00f3i, nh\u1eefng \u0111\u1ecbnh ngh\u0129a v\u00e0 l\u00fd thuy\u1ebft v\u1ec1 \u0111i\u1ec7n tr\u1edf c\u1ee7a d\u00e2y d\u1eabn \u0111\u1ecbnh lu\u1eadt \u00d4m \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i \u0111\u1ec1 c\u1eadp tr\u00ean \u0111\u00e2y. Hy v\u1ecdng nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y c\u00f3 th\u1ec3 gi\u00fap c\u00e1c em hi\u1ec3u h\u01a1n, l\u00e0m b\u00e0i t\u1eadp d\u1ec5 d\u00e0ng h\u01a1n. Ch\u00fang t\u00f4i \u0111\u00e3 \u0111\u01b0a ra t\u1ea5t c\u1ea3 c\u00e1c c\u00f4ng th\u1ee9c v\u00e0 v\u00ed d\u1ee5 li\u00ean quan. Vi\u1ec7c ghi nh\u1edb nh\u1eefng v\u00ed d\u1ee5 n\u00e0y s\u1ebd gi\u00fap c\u00e1c em l\u00e0m b\u00e0i t\u1eadp t\u1ed1t h\u01a1n. C\u1ea3m \u01a1n c\u00e1c em \u0111\u00e3 \u0111\u00f3n \u0111\u1ecdc b\u00e0i vi\u1ebft n\u00e0y.<\/p>\n\n\n\n
Tr\u00ean trang ch\u1ee7 c\u1ee7a ch\u00fang t\u00f4i c\u00f3 r\u1ea5t nhi\u1ec1u nh\u1eefng b\u00e0i vi\u1ebft kh\u00e1c thu\u1ed9c ch\u1ee7 \u0111\u1ec1 v\u1eadt l\u00fd h\u1ecdc. C\u00e1c em c\u00f3 th\u1ec3 tham kh\u1ea3o ngay t\u1ea1i \u0111\u00e2y. H\u00e3y truy c\u1eadp v\u00e0<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Cu\u1ed9c s\u1ed1ng h\u1eb1ng ng\u00e0y c\u1ee7a ch\u00fang ta kh\u00f4ng th\u1ec3 thi\u1ebfu \u0111i s\u1ef1 c\u00f3 m\u1eb7t c\u1ee7a d\u00e2y d\u1eabn \u0111i\u1ec7n. D\u00e2y \u0111i\u1ec7n \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t ph\u1ea7n c\u1ee7a cu\u1ed9c s\u1ed1ng. Tuy nhi\u00ean, kh\u00f4ng ph\u1ea3i ai c\u0169ng hi\u1ec3u v\u1ec1 s\u1ef1 v\u1eadn h\u00e0nh c\u1ee7a d\u00e2y \u0111i\u1ec7n c\u0169ng nh\u01b0 nh\u1eefng y\u1ebfu t\u1ed1 \u1ea3nh h\u01b0\u1edfng […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[4,7],"tags":[],"class_list":["post-1237","post","type-post","status-publish","format-standard","hentry","category-trung-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1237","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=1237"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1237\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}