B\u00e0i 2 (trang 146 SGK V\u1eadt L\u00fd 12)L<\/b>\u00a0Tr\u00ecnh b\u00e0y c\u1ea5u t\u1ea1o v\u00e0 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u1ed1ng Cu-li-gi\u01a1.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
C\u1ea5u t\u1ea1o v\u00e0 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u1ed1ng Cu-li-gi\u01a1 :<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-574.png\")
<\/p>\n
a) C\u1ea5u t\u1ea1o: \u1ed0ng Cu-li-gi\u01a1 l\u00e0 m\u1ed9t \u1ed1ng th\u1ee7y tinh b\u00ean trong l\u00e0 ch\u00e2n kh\u00f4ng, g\u1ed3m m\u1ed9t d\u00e2y nung b\u1eb1ng vonfam FF’ d\u00f9ng l\u00e0m ngu\u1ed3n electron v\u00e0 hai \u0111i\u1ec7n c\u1ef1c.<\/p>\n
Catot K: b\u1eb1ng kim lo\u1ea1i, h\u00ecnh ch\u1ecfm c\u1ea7u \u0111\u1ec3 l\u00e0m cho c\u00e1c electron ph\u00f3ng ra t\u1eeb FF’ \u0111\u1ec1u h\u1ed9i t\u1ee5 v\u00e0o anot.<\/p>\n
Anot A: b\u1eb1ng kim lo\u1ea1i c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng nguy\u00ean t\u1eed l\u1edbn v\u00e0 \u0111i\u1ec3m n\u00f3ng ch\u1ea3y cao.<\/p>\n
b) Ho\u1ea1t \u0111\u1ed9ng: D\u00e2y FF’ \u0111\u01b0\u1ee3c nung n\u00f3ng b\u1eb1ng m\u1ed9t d\u00f2ng \u0111i\u1ec7n. Ng\u01b0\u1eddi ta \u0111\u1eb7t gi\u1eefa anot v\u00e0 catot m\u1ed9t hi\u1ec7u \u0111i\u1ec7n th\u1ebf c\u1ee1 v\u00e0i ch\u1ee5c kilovon. C\u00e1c electron bay ra t\u1eeb FF’ \u0111\u1ebfn \u0111\u1eadp v\u00e0o anot l\u00e0m ph\u00e1t ra tia X.<\/p>\n
B\u00e0i 3 (trang 146 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0N\u00eau c\u00e1c t\u00ednh ch\u1ea5t v\u00e0 t\u00e1c d\u1ee5ng c\u1ee7a tia X.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
a) C\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a tia X :<\/p>\n
Tia X c\u00f3 kh\u1ea3 n\u0103ng \u0111\u00e2m xuy\u00ean.<\/p>\n
L\u00e0m \u0111en k\u00ednh \u1ea3nh.<\/p>\n
L\u00e0m ph\u00e1t quang m\u1ed9t s\u1ed1 ch\u1ea5t.<\/p>\n
L\u00e0m ion h\u00f3a kh\u00f4ng kh\u00ed.<\/p>\n
C\u00f3 t\u00e1c d\u1ee5ng sinh l\u00ed.<\/p>\n
b) T\u00e1c d\u1ee5ng c\u1ee7a tia X: Tia X d\u00f9ng trong y h\u1ecdc \u0111\u1ec3 chi\u1ebfu \u0111i\u1ec7n, ch\u1ee5p \u0111i\u1ec7n, ch\u1eefa b\u1ec7nh ung th\u01b0 n\u00f4ng. Trong c\u00f4ng nghi\u1ec7p \u0111\u1ec3 t\u00ecm khuy\u1ebft t\u1eadt c\u00e1c v\u1eadt \u0111\u00fac b\u1eb1ng kim lo\u1ea1i v\u00e0 trong c\u00e1c tinh th\u1ec3. Trong giao th\u00f4ng \u0111\u1ec3 ki\u1ec3m tra h\u00e0nh l\u00ed c\u1ee7a c\u00e1c h\u00e0nh kh\u00e1ch \u0111i m\u00e1y bay\u2026<\/p>\n
B\u00e0i 4 (trang 146 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0N\u00eau t\u00ean c\u00e1c s\u00f3ng ho\u1eb7c tia trong thang s\u00f3ng \u0111i\u1ec7n t\u1eeb theo th\u1ee9 t\u1ef1 t\u1eeb b\u01b0\u1edbc s\u00f3ng ng\u1eafn \u0111\u1ebfn b\u01b0\u1edbc s\u00f3ng d\u00e0i.<\/span><\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
C\u00e1c s\u00f3ng ho\u1eb7c tia trong thang s\u00f3ng \u0111i\u1ec7n t\u1eeb theo th\u1ee9 t\u1ef1 t\u1eeb b\u01b0\u1edbc s\u00f3ng ng\u1eafn \u0111\u1ebfn b\u01b0\u1edbc s\u00f3ng d\u00e0i: tia gama, tia X, tia t\u1eed ngo\u1ea1i, \u00e1nh s\u00e1ng nh\u00ecn th\u1ea5y, tia h\u1ed3ng ngo\u1ea1i, s\u00f3ng v\u00f4 tuy\u1ebfn.<\/p>\n
B\u00e0i 5 (trang 146 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Ch\u1ecdn c\u00e2u \u0111\u00fang.<\/span><\/p>\nTia X c\u00f3 b\u01b0\u1edbc s\u00f3ng.<\/p>\n
A. l\u1edbn h\u01a1n tia h\u1ed3ng ngo\u1ea1i<\/p>\n
B. l\u1edbn h\u01a1n tia t\u1eed ngo\u1ea1i<\/p>\n
C. nh\u1ecf h\u01a1n tia t\u1eed ngo\u1ea1i<\/p>\n
D. kh\u00f4ng th\u1ec3 \u0111o \u0111\u01b0\u1ee3c<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
Ch\u1ecdn \u0111\u00e1p \u00e1n C.<\/p>\n
B\u00e0i 6 (trang 146 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0Hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa anot v\u00e0 catot c\u1ee7a m\u1ed9t \u1ed1ng Cu \u2013 lit \u2013 gi\u01a1 l\u00e0 10kV. T\u00ednh t\u1ed1c \u0111\u1ed9 v\u00e0 \u0111\u1ed9ng n\u0103ng c\u1ef1c \u0111\u1ea1i c\u1ee7a c\u00e1c electron, khi \u0111\u1eadp v\u00e0o anot.<\/span><\/p>\nCho bi\u1ebft: kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 \u0111i\u1ec7n t\u00edch c\u1ee7a electron: me<\/sub>\u00a0= 9,1.10-31<\/sup>\u00a0kg; e = – 1,6.10-19<\/sup>C.<\/p>\nL\u1eddi gi\u1ea3i:<\/b><\/p>\n
Khi electron chuy\u1ec3n \u0111\u1ed9ng v\u1ec1 anot, \u00e1p d\u1ee5ng \u0111\u1ecbnh l\u00ed \u0111\u1ed9ng n\u0103ng ta c\u00f3:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-575.png\")
<\/p>\n
T\u1ed1c \u0111\u1ed9 c\u1ee7a electron:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/2-388.png\")
<\/p>\n
B\u00e0i 7 (trang 146 SGK V\u1eadt L\u00fd 12):<\/b>\u00a0M\u1ed9t \u1ed1ng Cu \u2013 lit \u2013 gi\u01a1 c\u00f3 c\u00f4ng su\u1ea5t 400W, hi\u1ec7u \u0111i\u1ec7n th\u1ebf gi\u1eefa anot v\u00e0 catot c\u00f3 gi\u00e1 tr\u1ecb 10kV. H\u00e3y t\u00ednh:<\/span><\/p>\na) C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n trung b\u00ecnh v\u00e0 s\u1ed1 electron qua \u1ed1ng trong m\u1ed7i gi\u00e2y.<\/p>\n
b) Nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra tr\u00ean anot trong m\u1ed7i ph\u00fat.<\/p>\n
L\u1eddi gi\u1ea3i:<\/b><\/p>\n
a) C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n trung b\u00ecnh qua \u1ed1ng:<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/1-576.png\")
<\/p>\n
G\u1ecdi n l\u00e0 s\u1ed1 electron qua \u1ed1ng trong m\u1ed7i gi\u00e2y<\/p>\n
![\"\"](\"https:\/\/lop12.edu.vn\/wp-content\/uploads\/2018\/03\/2-389.png\")
<\/p>\n
b) Nhi\u1ec7t l\u01b0\u1ee3ng t\u1ecfa ra tr\u00ean \u0111\u1ed1i catot trong m\u1ed7i ph\u00fat<\/p>\n
Q = P.t = 400.60 = 24000 (J)<\/p>\n
\n
<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
B\u00e0i 1 (trang 146 SGK V\u1eadt L\u00fd 12):\u00a0Tia X l\u00e0 g\u00ec ? L\u1eddi gi\u1ea3i: Tia X\u00a0l\u00e0 s\u00f3ng \u0111i\u1ec7n t\u1eeb, c\u00f3 b\u01b0\u1edbc s\u00f3ng t\u1eeb 10-11m \u0111\u1ebfn 10-8m. B\u00e0i 2 (trang 146 SGK V\u1eadt L\u00fd 12)L\u00a0Tr\u00ecnh b\u00e0y c\u1ea5u t\u1ea1o v\u00e0 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u1ed1ng Cu-li-gi\u01a1. L\u1eddi gi\u1ea3i: C\u1ea5u t\u1ea1o v\u00e0 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a \u1ed1ng Cu-li-gi\u01a1 : a) […]<\/p>\n","protected":false},"author":3,"featured_media":24687,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"tdm_status":"","tdm_grid_status":""},"categories":[1303],"tags":[1428,1427],"yoast_head":"\n
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