Khi \u0111\u1ecdc \u0111\u1ec1 b\u00e0i, \u0111\u1eb7c bi\u1ec7t l\u00e0 \u0111\u1ec1 b\u00e0i t\u1eadp V\u1eadt l\u00ed, h\u1ecdc sinh th\u01b0\u1eddng ch\u1ec9 ch\u00fa tr\u1ecdng \u0111\u1ebfn s\u1ed1 li\u1ec7u, d\u1eef ki\u1ec7n b\u00e0i to\u00e1n m\u00e0 l\u01b0\u1edbt qua y\u00eau c\u1ea7u d\u1eabn \u0111\u1ebfn hi\u1ec3u sai n\u1ed9i dung, y\u00eau c\u1ea7u c\u1ee7a \u0111\u1ec1 b\u00e0i.<\/p>\n

\u0110\u1ec3 tr\u00e1nh hi\u1ec3u sai y\u00eau c\u1ea7u c\u1ee7a \u0111\u1ec1 b\u00e0i, h\u1ecdc sinh c\u1ea7n l\u01b0u \u00fd, g\u1ea1ch ch\u00e2n m\u1ed9t s\u1ed1 c\u1ee5m t\u1eeb kh\u00f3a khi \u0111\u1ecdc \u0111\u1ec1 b\u00e0i, v\u00ed d\u1ee5 nh\u01b0 c\u00f9ng pha, ng\u01b0\u1ee3c pha, vu\u00f4ng pha, s\u1edbm pha, tr\u1ec5 pha, l\u1ec7ch pha, c\u00f3 th\u1ec3 – kh\u00f4ng th\u1ec3, kh\u00f4ng \u0111\u00fang, g\u1ea7n gi\u00e1 tr\u1ecb n\u00e0o nh\u1ea5t, \u2026<\/p>\n

V\u00ed d\u1ee5: Nh\u1eadn \u0111\u1ecbnh n\u00e0o d\u01b0\u1edbi \u0111\u00e2y l\u00e0\u00a0kh\u00f4ng\u00a0<\/strong>\u0111\u00fang khi n\u00f3i v\u1ec1 m\u1ed9t v\u1eadt dao \u0111\u1ed9ng \u0111i\u1ec1u h\u00f2a?<\/p>\n

A. V\u1eadn t\u1ed1c tr\u1ec5 pha h\u01a1n li \u0111\u1ed9 g\u00f3c \u03c0\/2<\/p>\n

B. Li \u0111\u1ed9 ng\u01b0\u1ee3c pha so v\u1edbi gia t\u1ed1c<\/p>\n

C. L\u1ef1c k\u00e9o v\u1ec1 s\u1edbm pha h\u01a1n v\u1eadn t\u1ed1c g\u00f3c \u03c0\/2<\/p>\n

D. T\u1ed1c \u0111\u1ed9 trung b\u00ecnh c\u1ee7a v\u1eadt trong m\u1ed9t chu k\u00ec v\u00e0 n\u1eeda chu k\u00ec dao \u0111\u1ed9ng l\u00e0 nh\u01b0 nha<\/p>\n<\/div>\n

<\/p>\n

T\u00f4 nh\u1ea7m \u0111\u00e1p \u00e1n<\/strong><\/p>\n

M\u1ed9t s\u1ed1 h\u1ecdc sinh th\u01b0\u1eddng c\u00f3 th\u00f3i quen khoanh \u0111\u00e1p \u00e1n v\u00e0o \u0111\u1ec1 thi, cu\u1ed1i gi\u1edd m\u1edbi t\u00f4 \u0111\u00e1p \u00e1n v\u00e0o phi\u1ebfu tr\u1ea3 l\u1eddi tr\u1eafc nghi\u1ec7m. \u00c1p l\u1ef1c t\u00e2m l\u00ed, \u00e1p l\u1ef1c th\u1eddi gian khi\u1ebfn h\u1ecdc sinh kh\u00f3 tr\u00e1nh kh\u1ecfi nh\u1ea7m l\u1eabn gi\u1eefa c\u00e2u \u0111\u00e3 khoanh tr\u00ean \u0111\u1ec1 v\u1edbi c\u00e2u c\u1ea7n t\u00f4 tr\u00ean phi\u1ebfu.<\/p>\n

\u0110\u1ec3 tr\u00e1nh vi\u1ec7c t\u00f4 nh\u1ea7m \u0111\u00e1p \u00e1n, h\u1ecdc sinh h\u00e3y l\u00e0m m\u1ed9t m\u1ea1ch 30 c\u00e2u \u0111\u1ea7u ti\u00ean (nh\u00f3m c\u00e1c c\u00e2u d\u1ec5 nh\u1ea5t \u0111\u1ec1 thi) sau \u0111\u00f3 d\u1eebng l\u1ea1i t\u00f4 th\u1eadt c\u1ea9n th\u1eadn v\u00e0o phi\u1ebfu, ti\u1ebfp t\u1ee5c l\u00e0m 10 c\u00e2u n\u1eefa (t\u1eeb 31 \u0111\u1ebfn 40) r\u1ed3i l\u1ea1i t\u00f4 v\u00e0o phi\u1ebfu. Khi c\u00f2n 10 c\u00e2u cu\u1ed1i c\u00f9ng, l\u00e0m \u0111\u01b0\u1ee3c ch\u1eafc ch\u1eafn th\u00eam c\u00e2u n\u00e0o th\u00ec t\u00f4 ngay (v\u00ec \u0111\u00e2y l\u00e0 nh\u00f3m kh\u00f3 nh\u1ea5t, c\u00f3 t\u00ednh ph\u00e2n lo\u1ea1i cao), v\u1edbi c\u00e1c c\u00e2u kh\u00f4ng gi\u1ea3i \u0111\u01b0\u1ee3c th\u00ec d\u00f9ng ph\u01b0\u01a1ng \u00e1n lo\u1ea1i tr\u1eeb gi\u1ea3m b\u1edbt \u0111\u00e1p \u00e1n, so s\u00e1nh v\u1edbi s\u1ed1 c\u00e2u \u0111\u00e3 gi\u1ea3i \u0111\u00fang \u0111\u1ec3 c\u00f3 th\u1ec3 t\u00ecm \u0111\u01b0\u1ee3c ph\u01b0\u01a1ng \u00e1n c\u00f3 t\u1ec9 l\u1ec7 \u0111\u00fang cao nh\u1ea5t.<\/p>\n

\u00c1p l\u1ef1c v\u00e0 lo l\u1eafng trong ph\u00f2ng thi<\/strong><\/p>\n

\u0110\u1eb7t ra m\u1ee5c ti\u00eau nh\u01b0 b\u1eaft bu\u1ed9c ph\u1ea3i \u0111\u1eadu, b\u1eaft bu\u1ed9c ph\u1ea3i \u0111i\u1ec3m cao\u2026 v\u00f4 h\u00ecnh t\u1ea1o ra \u00e1p l\u1ef1c kh\u00f4ng nh\u1ecf trong ph\u00f2ng thi. H\u00e3y tho\u1ea3i m\u00e1i t\u00e2m l\u00ed, c\u1ed1 g\u1eafng l\u00e0m h\u1ebft kh\u1ea3 n\u0103ng c\u1ee7a m\u00ecnh \u0111\u1ec3 kh\u00f4ng c\u00f3 g\u00ec ph\u1ea3i h\u1ed1i h\u1eadn. Trong th\u1eddi gian ch\u1edd \u0111\u1ee3i gi\u00e1m th\u1ecb ph\u00e1t \u0111\u1ec1 thi, n\u00ean u\u1ed1ng v\u00e0i h\u1ee5m n\u01b0\u1edbc, tr\u00f2 chuy\u1ec7n v\u1edbi c\u00e1c b\u1ea1n xung quanh \u0111\u1ec3 qu\u00ean \u0111i c\u1ea3m gi\u00e1c l\u00e0 m\u00ecnh \u0111ang \u1edf trong ph\u00f2ng thi, nh\u1eefng ng\u01b0\u1eddi xung quanh l\u00e0 nh\u1eefng ng\u01b0\u1eddi b\u1ea1n \u0111\u00edch th\u1ef1c c\u1ee7a m\u00ecnh.<\/p>\n

Cu\u1ed1i c\u00f9ng, c\u00e1ch hi\u1ec7u qu\u1ea3 nh\u1ea5t \u0111\u1ec3 tr\u00e1nh nh\u1eefng sai l\u1ea7m n\u00e0y ch\u00ednh l\u00e0 vi\u1ec7c r\u00e8n luy\u1ec7n nhi\u1ec1u \u0111\u1ec1 thi, th\u01b0\u1eddng xuy\u00ean tham gia thi th\u1eed \u0111\u1ec3 v\u1eeba ki\u1ec3m tra ki\u1ebfn th\u1ee9c, t\u1ea1o c\u01a1 h\u1ed9i \u0111\u1ec3 m\u00ecnh m\u1eafc sai l\u1ea7m \u0111\u1ec3 \u201cnh\u1edb \u0111\u1eddi\u201d v\u00e0 kh\u00f4ng bao gi\u1edd m\u1eafc l\u1ea1i sai l\u1ea7m \u0111\u00e1ng ti\u1ebfc n\u00e0y n\u1eefa.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111i\u1ec3m s\u1ed1 cao m\u00f4n V\u1eadt l\u00ed THPT qu\u1ed1c gia 2016, ngo\u00e0i trang b\u1ecb ki\u1ebfn th\u1ee9c v\u1eefng ch\u1eafc, h\u1ecdc sinh c\u1ea7n c\u1ea9n th\u1eadn, t\u1ec9 m\u1ec9 l\u00e0m t\u1eebng c\u00e2u h\u1ecfi, \u0111\u1eb7c bi\u1ec7t l\u00e0 nh\u1eefng c\u00e2u h\u1ecfi c\u00f3 b\u1eaby. M\u1ed9t sai s\u00f3t nh\u1ecf c\u0169ng c\u00f3 th\u1ec3 khi\u1ebfn h\u1ecdc sinh m\u1ea5t \u0111i\u1ec3m \u0111\u00e1ng ti\u1ebfc. Theo kinh […]<\/p>\n","protected":false},"author":2,"featured_media":744,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[158],"tags":[],"yoast_head":"\n