Chuyen de Tu dienBT 11NC - Trang - 1 - GV : ng Qu c Dng...

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Unformatted text preview: Trang - 1 - GV : ng Qu c Dng CHUYN : TM T T L THUY T 1. nh ngha : T i n l m t h hai v t d n t g n nhau. M i v t d n g i l m t b n c a t i n. Kho ng khng gian gi a hai b n c th l chn khng hay b chi m b i m t ch t i n mi no . K hi u : 2. i n dung c a t i n : c tr ng cho kh nng tch i n c a t i n. Q C U = Trong : C l i n dung c a t i n ; n v : fara ; k hi u : F Q : l n i n tch trn m i b n t i n (C) 3. Cng th c tnh i n dung c a t i n ph ng : 4. S C kd = Trong : S : l ph n di n tch i di n gi a hai b n t (m 2 ) : h ng s i n mi c a ch t i n mi chi m y gi a hai b n ; d : kho ng cch gi a hai b n t . * T i n c kh nng tch i n (n p i n) v phng i n . * Khi n i t i n v i ngu n th U = const ; khi ng t t i n kh i ngu n th Q = const. (c l p v i n) * Hai b n t tch i n tri d u v cng l n. * Bnh th ng t i n l v t cch i n (do gi a chng l i n mi). * N u gi a i n tr ng gi a hai b n t > E gi i h n = 3.10 6 (V/m) : th i n mi b nh th ng ; t i n tr thnh v t d n i n. 4. Ghp t i n : Cch ghp Ghp song song (C 1 // C 2 // //C n ) Ghp n i ti p (C 1 nt C 2 ntnt C n ) i n tch 1 2 ... b n Q Q Q Q = + + + 1 2 ... b n Q Q Q Q = = = = Hi u i n th 1 2 ... b n U U U U = = = = 1 2 3 ... b n U U U U U = + + + + i n dung 1 2 ... b n C C C C = + + + 1 2 1 1 1 1 ... b n C C C C = + + + Ch * Ghp song song i n dung b tng ln * N u cc t i n gi ng nhau 1 2 ... n C C C C = = = = th C b = n.C * Ghp n i ti p i n dung b gi m . * N u cc t i n gi ng nhau 1 2 ... n C C C C = = = = th b C C n = 5. Nng l ng c a t i n (Nng l ng i n tr ng ) 2 . 2 CU W = ho c 2 2 Q W C = ho c . 2 QU W = ho c 2 . . 8. E W V k = Trong : V = S.d : th tch kho ng khng gian gi a hai b n t . S : l ph n di n tch i di n gi a hai b n (m 2 ) d : kho ng cch gi a hai b n t 6. M t nng l ng i n tr ng (nng l ng i n tr ng trong m t n v th tch 2 ....
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This note was uploaded on 02/24/2012 for the course ENGINEERIN 101 taught by Professor Johnw.walder during the Spring '11 term at American Public University.

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Chuyen de Tu dienBT 11NC - Trang - 1 - GV : ng Qu c Dng...

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