Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n
Ch\u00fang ta th\u01b0\u1eddng n\u00f3i nhi\u1ec1u v\u1ec1 \u0111i\u1ec7n tr\u1edf trong ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd 9. Tuy nhi\u00ean, \u0111\u00e2y l\u1ea1i l\u00e0 m\u1ed9t trong nh\u1eefng \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y. N\u1ebfu nh\u01b0 c\u00e1c b\u1ea1n ngh\u0129 r\u1eb1ng, bi\u1ebfn tr\u1edf ch\u1ec9 d\u00f9ng trong m\u1ea1ch \u0111i\u1ec7n. Th\u00ec ngay c\u1ea3 trong k\u1ef9 thu\u1eadt \u0111i\u1ec7n tr\u1edf c\u0169ng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng r\u1ea5t nhi\u1ec1u. Trong b\u00e0i vi\u1ebft ng\u00e0y h\u00f4m nay, ch\u00fang ta h\u00e3y c\u00f9ng nhau t\u00ecm hi\u1ec3u v\u1ec1 bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt nh\u00e9! Nh\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 \u0111i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 gi\u00fap \u00edch cho ch\u00fang ta r\u1ea5t nhi\u1ec1u trong cu\u1ed9c s\u1ed1ng.<\/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 t\u00ecm hi\u1ec3u v\u1ec1 \u0111i\u1ec7n tr\u1edf trong c\u00e1c b\u00e0i vi\u1ebft tr\u01b0\u1edbc. Tuy nhi\u00ean \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng ki\u1ebfn th\u1ee9c cho c\u00e1c em. Ch\u00fang t\u00f4i v\u1eabn s\u1ebd nh\u1eafc l\u1ea1i v\u1ec1 \u0111i\u1ec7n tr\u1edf trong ph\u1ea7n n\u00e0y c\u1ee7a b\u00e0i vi\u1ebft. \u0110i\u1ec7n tr\u1edf \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 kh\u1ea3 n\u0103ng c\u1ea3n tr\u1edf d\u00f2ng \u0111i\u1ec7n c\u1ee7a v\u1eadt li\u1ec7u. \u0110i\u1ec7n tr\u1edf c\u1ee7a m\u1ed7i v\u1eadt li\u1ec7u l\u00e0 kh\u00e1c nhau. \u0110\u00e2y l\u00e0 m\u1ed9t \u0111\u1ea1i l\u01b0\u1ee3ng v\u1eadt l\u00fd g\u1eafn li\u1ec1n v\u1edbi m\u1ea1ch \u0111i\u1ec7n, d\u00f2ng \u0111i\u1ec7n. \u0110i\u1ec7n tr\u1edf c\u1ee7a nh\u1eefng v\u1eadt d\u1eabn c\u00e0ng l\u1edbn th\u00ec v\u1eadt \u0111\u00f3 d\u1eabn \u0111i\u1ec7n c\u00e0ng k\u00e9m. Ng\u01b0\u1ee3c l\u1ea1i, \u0111i\u1ec7n tr\u1edf c\u1ee7a v\u1eadt c\u00e0ng nh\u1ecf th\u00ec v\u1eadt \u0111\u00f3 d\u1eabn \u0111i\u1ec7n t\u1ed1t. Bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt c\u00f3 \u00fd ngh\u0129a r\u1ea5t l\u1edbn.<\/p>\n\n\n\n
M\u1ea1ch \u0111i\u1ec7n c\u00f3 bao g\u1ed3m bi\u1ebfn tr\u1edf<\/p>\n\n\n\n
\u0110\u1ed1i v\u1edbi nh\u1eefng v\u1eadt kh\u00f4ng d\u1eabn \u0111i\u1ec7n th\u00ec \u0111i\u1ec7n tr\u1edf b\u1eb1ng kh\u00f4ng. Hay ta n\u00f3i, v\u1eadt kh\u00f4ng d\u1eabn \u0111i\u1ec7n kh\u00f4ng c\u00f3 \u0111i\u1ec7n tr\u1edf. Theo nh\u1eefng th\u00ed nghi\u1ec7m v\u00e0o nghi\u00ean c\u1ee9u c\u1ee7a c\u00e1c nh\u00e0 v\u1eadt l\u00fd h\u1ecdc, c\u00e1c ch\u1ea5t kh\u00e1c nhau c\u00f3 \u0111i\u1ec7n tr\u1edf kh\u00e1c nhau. Nghi\u00ean c\u1ee9u v\u1ec1 \u0111i\u1ec7n tr\u1edf, ch\u00fang ta c\u00f3 th\u1ec3 bi\u1ebft \u0111\u00e2u l\u00e0 ch\u1ea5t d\u1eabn \u0111i\u1ec7n t\u1ed1t. Gi\u1ed1ng nh\u01b0 nh\u1eefng \u0111o\u1ea1n d\u00e2y \u0111i\u1ec7n trong cu\u1ed9c s\u1ed1ng th\u01b0\u1eddng ng\u00e0y \u0111\u1ec1u \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng \u0111\u1ed3ng. B\u1edfi ch\u1ea5t li\u1ec7u n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng d\u1eabn \u0111i\u1ec7n \u1ed5n \u0111\u1ecbnh, \u0111i\u1ec7n tr\u1edf nh\u1ecf.<\/p>\n\n\n\n
Tuy nhi\u00ean, nh\u1eefng ch\u1ea5t li\u1ec7u nh\u01b0 len, v\u1ea3i kh\u00f4ng d\u1eabn \u0111i\u1ec7n th\u00ec \u0111i\u1ec7n tr\u1edf b\u1eb1ng kh\u00f4ng. \u1ee8ng d\u1ee5ng bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt \u0111\u1ec1u \u0111i t\u1eeb nghi\u00ean c\u1ee9u ban \u0111\u1ea7u n\u00e0y ph\u00e1t tri\u1ec3n l\u00ean. \u0110\u00f3 ch\u00ednh l\u00e0 l\u00fd do ch\u00fang ta ph\u1ea3i t\u00ecm hi\u1ec3u v\u1ec1 ngu\u1ed3n g\u1ed1c c\u1ee7a m\u1ed9t v\u1ea5n \u0111\u1ec1 tr\u01b0\u1edbc khi t\u00ecm hi\u1ec3u chi ti\u1ebft. Bi\u1ebfn tr\u1edf c\u0169ng l\u00e0 m\u1ed9t trong nh\u1eefng \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ea5t nhi\u1ec1u. Ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u v\u1ec1 bi\u1ebfn tr\u1edf ngay sau \u0111\u00e2y.<\/p>\n\n\n\n
Bi\u1ebfn tr\u1edf l\u00e0 g\u00ec?<\/p>\n\n\n\n
Tr\u01b0\u1edbc khi \u0111\u1ebfn v\u1edbi \u1ee9ng d\u1ee5ng c\u1ee7a bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt, ch\u00fang ta ph\u1ea3i c\u00f3 ki\u1ebfn th\u1ee9c chung v\u1ec1 \u0111i\u1ec1u n\u00e0y. Bi\u1ebfn tr\u1edf ch\u00ednh l\u00e0 m\u1ed9t lo\u1ea1i \u0111i\u1ec7n tr\u1edf c\u00f3 th\u1ec3 thay \u0111\u1ed5i tr\u1ecb s\u1ed1. Bi\u1ebfn tr\u1edf \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 thay \u0111\u1ed5i c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n. \u0110\u00e2y ch\u00ednh l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n t\u1eeb \u0111i\u1ec7n tr\u1edf th\u00f4ng th\u01b0\u1eddng. V\u1edbi bi\u1ebfn tr\u1edf, ch\u00fang ta c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c ph\u1ea7n t\u1eed \u0111i\u1ec7n. Nh\u01b0 ch\u00fang ta \u0111\u00e3 bi\u1ebft, kh\u00f4ng ph\u1ea3i ph\u1ea7n t\u1eed \u0111i\u1ec7n n\u00e0y c\u0169ng c\u00f3 th\u1ec3 ch\u1ecbu c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n nh\u01b0 nhau. S\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a bi\u1ebfn tr\u1edf c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi t\u1ea5t c\u1ea3.<\/p>\n\n\n\n
C\u1ea5u t\u1ea1o c\u1ee7a bi\u1ebfn tr\u1edf<\/p>\n\n\n\n
C\u00e1c lo\u1ea1i bi\u1ebfn tr\u1edf ch\u00fang ta th\u01b0\u1eddng g\u1eb7p \u0111\u00f3 ch\u00ednh l\u00e0: Bi\u1ebfn tr\u1edf con ch\u1ea1y, Bi\u1ebfn tr\u1edf tay quay, Bi\u1ebfn tr\u1edf than. N\u1ebfu \u0111\u1ec3 t\u00ecm hi\u1ec3u k\u1ef9 v\u1ec1 c\u00e1c lo\u1ea1i bi\u1ebfn tr\u1edf, ch\u00fang ta s\u1ebd ph\u1ea3i ti\u1ebfp c\u1eadn v\u1edbi nhi\u1ec1u ki\u1ebfn th\u1ee9c chuy\u00ean ng\u00e0nh. V\u00ec v\u1eady, \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd l\u1edbp 9, c\u00e1c em ch\u1ec9 c\u1ea7n bi\u1ebft \u0111\u1ebfn c\u00e1c lo\u1ea1i bi\u1ebfn tr\u1edf l\u00e0 \u0111\u01b0\u1ee3c. C\u00e1c em c\u0169ng kh\u00f4ng th\u1ec3 t\u1ef1 l\u00e0m th\u00ed nghi\u1ec7m. Tr\u00ean l\u1edbp, c\u00e1c th\u1ea7y c\u00f4 c\u00f3 th\u1ec3 l\u00e0m th\u00ed nghi\u1ec7m \u0111\u01a1n gi\u1ea3n cho c\u00e1c em. Tuy nhi\u00ean, \u0111\u00f3 ch\u01b0a ph\u1ea3i t\u1ea5t c\u1ea3 \u1ee9ng d\u1ee5ng c\u1ee7a bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf trong k\u1ef9 thu\u1eadt.<\/p>\n\n\n\n
\u1ee8ng d\u1ee5ng c\u1ee7a bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt<\/p>\n\n\n\n
N\u1ebfu nh\u01b0 kh\u00f4ng t\u00ecm hi\u1ec3u, ch\u00fang ta kh\u00f3 c\u00f3 th\u1ec3 bi\u1ebft \u0111\u00f3 c\u00f3 ph\u1ea3i l\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf hay kh\u00f4ng? Tuy nhi\u00ean, sau khi t\u00ecm hi\u1ec3u ki\u1ebfn th\u1ee9c v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y, ch\u00fang ta c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng nh\u1eadn ra c\u00e1c \u1ee9ng d\u1ee5ng. Bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt \u0111\u01b0\u1ee3c d\u00f9ng nhi\u1ec1u nh\u01b0 c\u00e1c m\u1ea1ch \u0111i\u1ec7n c\u1ee7a Radio, Tivi,\u2026 H\u1ea7u h\u1ebft c\u00e1c m\u1ea1ch \u0111i\u1ec7n \u0111\u1ec1u c\u00f3 bi\u1ebfn tr\u1edf. B\u1edfi l\u1ebd, kh\u00f4ng ph\u1ea3i linh ki\u1ec7n \u0111i\u1ec7n t\u1eed n\u00e0o c\u0169ng th\u00edch h\u1ee3p v\u1edbi c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n, hi\u1ec7u \u0111i\u1ec7n th\u1ebf t\u1ed5ng.<\/p>\n\n\n\n
\u1ee8ng d\u1ee5ng c\u1ee7a bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf trong k\u1ef9 thu\u1eadt<\/p>\n\n\n\n
S\u1eed d\u1ee5ng bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt s\u1ebd gi\u00fap \u00edch \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y r\u1ea5t nhi\u1ec1u. \u0110\u1ed3 \u0111i\u1ec7n t\u1eed nh\u01b0 Tivi, Radio,\u2026 c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng l\u00e0 nh\u1edd v\u00e0o bi\u1ebfn tr\u1edf c\u00f3 trong m\u1ea1ch \u0111i\u1ec7n. C\u00e1c em c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y c\u00e1c m\u00f4 h\u00ecnh bi\u1ebfn tr\u1edf, \u0111i\u1ec7n tr\u1edf khi b\u00f3c t\u00e1ch c\u00e1c linh ki\u1ec7n c\u1ee7a nh\u1eefng m\u00f3n \u0111\u1ed3 n\u00e0y. Tuy nhi\u00ean, c\u00e1c em kh\u00f4ng n\u00ean l\u00e0m th\u1ebf. B\u1edfi ch\u1ec9 nh\u1eefng ng\u01b0\u1eddi c\u00f3 chuy\u00ean m\u00f4n m\u1edbi c\u00f3 th\u1ec3 th\u00e1o l\u1eafp linh ki\u1ec7n. Ch\u1ec9 c\u1ea7n bi\u1ebfn tr\u1edf, \u0111i\u1ec7n tr\u1edf trong c\u00e1c m\u1ea1ch \u0111i\u1ec7n c\u00f3 s\u1ef1 sai s\u00f3t. Th\u00ec to\u00e0n b\u1ed9 m\u1ea1ch \u0111i\u1ec7n \u0111\u1ec1u c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/p>\n\n\n\n
Hi\u1ec7n t\u01b0\u1ee3ng ch\u1eadp \u0111i\u1ec7n, qu\u00e1 t\u1ea3i \u0111i\u1ec7n c\u0169ng l\u00e0 do bi\u1ebfn tr\u1edf trong m\u1ea1ch \u0111i\u1ec7n kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng. \u0110i\u1ec1u n\u00e0y ch\u00fang ta c\u00f3 th\u1ec3 th\u1ea5y nhi\u1ec1u trong cu\u1ed9c s\u1ed1ng h\u1eb1ng ng\u00e0y. D\u00f9ng bi\u1ebfn tr\u1edf \u0111\u1ec3 thay \u0111\u1ed5i c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n l\u00e0 c\u00e1ch l\u00e0m d\u1ec5 d\u00e0ng nh\u1ea5t. Kh\u00f4ng ph\u1ea3i t\u1ef1 nhi\u00ean, bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt l\u1ea1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u \u0111\u1ebfn th\u1ebf. C\u00e1c em n\u00ean ghi nh\u1edb v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m c\u1ee7a bi\u1ebfn tr\u1edf, \u0111i\u1ec7n tr\u1edf \u0111\u1ec3 c\u00f3 th\u1ec3 l\u00e0m b\u00e0i ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n\n\n\n
B\u00e0i t\u1eadp v\u1ec1 bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt<\/p>\n\n\n\n
\u0110\u1ed1i v\u1edbi d\u1ea1ng b\u00e0i v\u1ec1 bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt c\u00e1c em v\u1eabn s\u1ebd g\u1eb7p b\u00e0i tr\u1eafc nghi\u1ec7m v\u00e0 t\u1ef1 lu\u1eadn. D\u1ea1ng b\u00e0i tr\u1eafc nghi\u1ec7m ch\u1ee7 y\u1ebfu c\u00e1c em s\u1ebd \u0111\u01b0\u1ee3c h\u1ecfi v\u1ec1 nh\u1eadn bi\u1ebft bi\u1ebfn tr\u1edf, \u0111i\u1ec7n tr\u1edf. Ch\u1ec9 c\u1ea7n nh\u1edb v\u1ec1 \u0111\u1ecbnh ngh\u0129a c\u1ee7a hai lo\u1ea1i n\u00e0y, c\u00e1c em ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 ch\u1ecdn \u0111\u01b0\u1ee3c \u0111\u00e1p \u00e1n \u0111\u00fang. Ngo\u00e0i ra c\u00e1c em c\u0169ng c\u1ea7n ghi nh\u1edb v\u1ec1 c\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a bi\u1ebfn tr\u1edf. Nhi\u1ec1u \u0111\u1ec1 b\u00e0i tr\u1eafc nghi\u1ec7m s\u1ebd h\u1ecfi v\u1ec1 \u0111i\u1ec1u n\u00e0y. V\u1eefng ki\u1ebfn th\u1ee9c, c\u00e1c em s\u1ebd l\u00e0m b\u00e0i d\u1ec5 d\u00e0ng v\u00e0 nhanh ch\u00f3ng h\u01a1n.<\/p>\n\n\n\n
Bi\u1ebfn tr\u1edf c\u00f3 m\u1eb7t trong nhi\u1ec1u \u0111\u1ed3 d\u00f9ng th\u01b0\u1eddng ng\u00e0y<\/p>\n\n\n\n
V\u1edbi d\u1ea1ng b\u00e0i t\u1ef1 lu\u1eadn, c\u00e1c em c\u00f3 th\u1ec3 b\u1ecb h\u1ecfi v\u1ec1 v\u1eadn d\u1ee5ng. Gi\u1ea3i th\u00edch hi\u1ec7n t\u01b0\u1ee3ng, ho\u1eb7c l\u1ef1a ch\u1ecdn bi\u1ebfn tr\u1edf ph\u00f9 h\u1ee3p trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p. \u0110i\u1ec1u n\u00e0y c\u1ea7n c\u00e1c em ph\u1ea3i suy ngh\u0129 s\u00e2u h\u01a1n v\u1ec1 bi\u1ebfn tr\u1edf v\u00e0 \u0111i\u1ec7n tr\u1edf. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y th\u00ec d\u00f9ng \u0111\u1ebfn bi\u1ebfn tr\u1edf, tr\u01b0\u1eddng h\u1ee3p n\u00e0o ch\u1ec9 c\u1ea7n \u0111i\u1ec7n tr\u1edf l\u00e0 \u0111\u1ee7. \u0110\u00e2y l\u00e0 d\u1ea1ng b\u00e0i v\u1eadn d\u1ee5ng cao \u1ee9ng d\u1ee5ng trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y. N\u1ebfu c\u00e1c em kh\u00f4ng nh\u1edb \u0111\u01b0\u1ee3c c\u00e1c v\u00ed d\u1ee5, c\u00f3 th\u1ec3 s\u1ebd g\u1eb7p ph\u1ea3i kh\u00f3 kh\u0103n.<\/p>\n\n\n\n
V\u00ed d\u1ee5 \u0111\u1ec1 b\u00e0i bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt<\/p>\n\n\n\n
Ch\u00fang t\u00f4i \u0111\u00e3 t\u1ed5ng h\u1ee3p m\u1ed9t s\u1ed1 v\u00ed d\u1ee5 v\u1ec1 \u0111\u1ec1 b\u00e0i c\u00e1c em th\u01b0\u1eddng g\u1eb7p trong ch\u1ee7 \u0111\u1ec1 bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt d\u01b0\u1edbi \u0111\u00e2y. C\u00e1c em c\u00f3 th\u1ec3 \u0111\u1ecdc v\u00e0 tham kh\u1ea3o c\u00e1ch l\u00e0m. T\u1eeb \u0111\u00f3 r\u00fat ra cho m\u00ecnh nh\u1eefng h\u01b0\u1edbng l\u00e0m chu\u1ea9n v\u00e0 v\u00ed d\u1ee5 th\u1ef1c t\u1ebf nh\u00e9!<\/p>\n\n\n\n
H\u00ecnh \u1ea3nh c\u00e1c bi\u1ebfn tr\u1edf th\u01b0\u1eddng g\u1eb7p<\/p>\n\n\n\n
\u0110\u1ec1 b\u00e0i 1:<\/p>\n\n\n\n
Trong k\u0129 thu\u1eadt, ch\u1eb3ng h\u1ea1n trong c\u00e1c m\u1ea1ch \u0111i\u1ec7n c\u1ee7a Radio, tivi\u2026 ng\u01b0\u1eddi ta c\u1ea7n s\u1eed d\u1ee5ng c\u00e1c \u0111i\u1ec7n tr\u1edf c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf v\u1edbi c\u00e1c tr\u1ecb s\u1ed1 kh\u00e1c nhau, c\u00f3 th\u1ec3 t\u1edbi v\u00e0i tr\u0103m megavon (1M\u2126 = 106\u2126 ). C\u00e1c \u0111i\u1ec7n tr\u1edf n\u00e0y \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng m\u1ed9t l\u1edbp than hay l\u1edbp kim lo\u1ea1i m\u1ecfng ph\u1ee7 ngo\u00e0i m\u1ed9t l\u1ecfi c\u00e1ch \u0111i\u1ec7n (th\u01b0\u1eddng b\u1eb1ng s\u1ee9). H\u00e3y gi\u1ea3i th\u00edch v\u00ec sao l\u1edbp than hay l\u1edbp kim lo\u1ea1i m\u1ecfng \u0111\u00f3 l\u1ea1i c\u00f3 \u0111i\u1ec7n tr\u1edf l\u1edbn.<\/p>\n\n\n\n
Gi\u1ea3i \u0111\u00e1p: L\u1edbp than hay l\u1edbp kim lo\u1ea1i m\u1ecfng l\u1ea1i c\u00f3 \u0111i\u1ec7n tr\u1edf l\u1edbn v\u00ec ti\u1ebft di\u1ec7n s c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 r\u1ea5t nh\u1ecf.<\/p>\n\n\n\n
\u0110\u1ec1 b\u00e0i 2:<\/p>\n\n\n\n
Bi\u1ebfn tr\u1edf l\u00e0 d\u1ee5ng c\u1ee5 d\u00f9ng \u0111\u1ec3 \u0111i\u1ec1u ch\u1ec9nh \u0111\u1ea1i l\u01b0\u1ee3ng n\u00e0o trong m\u1ea1ch?<\/p>\n\n\n\n
C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n.<\/p>\n\n\n\n
Hi\u1ec7u \u0111i\u1ec7n th\u1ebf.<\/p>\n\n\n\n
Nhi\u1ec7t \u0111\u1ed9 c\u1ee7a \u0111i\u1ec7n tr\u1edf.<\/p>\n\n\n\n
Chi\u1ec1u d\u00f2ng \u0111i\u1ec7n.<\/p>\n\n\n\n
\u0110\u00e1p \u00e1n: A. Theo l\u00fd thuy\u1ebft c\u1ee7a bi\u1ebfn tr\u1edf, ch\u00fang ta c\u00f3 th\u1ec3 ch\u1ecdn \u0111\u00e1p \u00e1n n\u00e0y.<\/p>\n\n\n\n
\u0110\u1ec1 b\u00e0i 3:<\/p>\n\n\n\n
Khi d\u1ecbch chuy\u1ec3n con ch\u1ea1y ho\u1eb7c tay quay c\u1ee7a bi\u1ebfn tr\u1edf, \u0111\u1ea1i l\u01b0\u1ee3ng n\u00e0o sau \u0111\u00e2y thay \u0111\u1ed5i theo?<\/p>\n\n\n\n
Ti\u1ebft di\u1ec7n d\u00e2y c\u1ee7a bi\u1ebfn tr\u1edf.<\/p>\n\n\n\n
\u0110i\u1ec7n tr\u1edf su\u1ea5t c\u1ee7a ch\u1ea5t l\u00e0m d\u00e2y d\u1eabn c\u1ee7a bi\u1ebfn tr\u1edf.<\/p>\n\n\n\n
Chi\u1ec1u d\u00e0i d\u00e2y d\u1eabn c\u1ee7a bi\u1ebfn tr\u1edf.<\/p>\n\n\n\n
Nhi\u1ec7t \u0111\u1ed9 c\u1ee7a bi\u1ebfn tr\u1edf.<\/p>\n\n\n\n
\u0110\u00e1p \u00e1n: C.<\/p>\n\n\n\n
Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 ch\u1ee7 \u0111\u1ec1 bi\u1ebfn tr\u1edf \u0111i\u1ec7n tr\u1edf d\u00f9ng trong k\u1ef9 thu\u1eadt. Hy v\u1ecdng nh\u1eefng th\u00f4ng tin ch\u00fang t\u00f4i \u0111em \u0111\u1ebfn tr\u00ean \u0111\u00e2y c\u00f3 th\u1ec3 gi\u00fap \u00edch cho c\u00e1c em. Nh\u1eefng v\u00ed d\u1ee5 v\u1ec1 b\u00e0i t\u1eadp v\u00e0 \u1ee9ng d\u1ee5ng trong cu\u1ed9c s\u1ed1ng l\u00e0 r\u1ea5t quan tr\u1ecdng. C\u00e1c em h\u00e3y h\u1ecdc thu\u1ed9c ho\u1eb7c ghi ch\u00e9p l\u1ea1i \u0111\u1ec3 s\u1eed d\u1ee5ng khi l\u00e0m b\u00e0i nh\u00e9! C\u1ea3m \u01a1n c\u00e1c em \u0111\u00e3 \u0111\u00f3n \u0111\u1ecdc b\u00e0i vi\u1ebft h\u00f4m nay c\u1ee7a ch\u00fang t\u00f4i.<\/p>\n\n\n\n
C\u00f3 r\u1ea5t nhi\u1ec1u b\u00e0i vi\u1ebft v\u1ec1 v\u1eadt l\u00fd 9 \u0111\u01b0\u1ee3c \u0111\u0103ng t\u1ea3i t\u1ea1i \u0111\u00e2y. C\u00e1c em c\u00f3 th\u1ec3 tham kh<\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"
Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn Ch\u00fang ta th\u01b0\u1eddng n\u00f3i nhi\u1ec1u v\u1ec1 \u0111i\u1ec7n tr\u1edf trong ch\u01b0\u01a1ng tr\u00ecnh v\u1eadt l\u00fd 9. Tuy nhi\u00ean, \u0111\u00e2y l\u1ea1i l\u00e0 m\u1ed9t trong nh\u1eefng \u1ee9ng d\u1ee5ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y. N\u1ebfu nh\u01b0 c\u00e1c b\u1ea1n ngh\u0129 r\u1eb1ng, bi\u1ebfn tr\u1edf ch\u1ec9 d\u00f9ng trong m\u1ea1ch \u0111i\u1ec7n. Th\u00ec ngay c\u1ea3 […]<\/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":[7],"tags":[],"class_list":["post-1243","post","type-post","status-publish","format-standard","hentry","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1243","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=1243"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1243\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1243"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1243"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1243"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}