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ƒ‰ ́ B ́ S ‰„0IŠ 4.ĐỊNH LUẬT FARADAY VỀ XUẤT ĐIỆN ĐỘNG CẢM ỨNG „Jh.?56,?l,-0)*+,-?56,./!‹ ‰ dФ dt },3cJy.0)*+,-?56,./! \ 5:=5E,3FG,-;H,!3I-JKL,M,-N „Jh.?56,?l,-0)*+,-a|,-=6.U}I^=8.U:5;hJ=G5.^0?la5],.35E,012./ .3M,-rJ2*703 k ξ 0O.393b0c8*70303JKk,?l,-.U,-./.UFg,-p3M,-?s53b0c8 *703?+,-KE,.U,-./.UFg,-a5],.35E, 5.ĐOẠN DÂY DẪN TỊNH TIẾN CẮT ĐƯỜNG CẢM ỨNG CỦA TỪ TRƯỜNG ĐỀU „Jh.?56,?l,-0)*+,-! ξ ‰c=I5,Š .U,-?OŠ‰v ́n, ́ B ¿ ]J325.32,3U2K0:03?56,.39*7033V56J?56,.3]-5f2325?qJ.32,3 a|,-! ‰ ξ ‰=cI5,Š ]J325.32,3U2K;H,?56,.39*703pj,.39.U}I^;>,-?56,0)*+,-! ‰ ξ ∁ Rtm ‰ bvlsinα R+r 6.KHUNG DÂY QUAY TRONG TỪ TRƯỜNG ĐỀU ξ ‰ dΦ dt ‰„ ω I5,v ω .Œ φ w 2K ξ • I5,v ω .Œ φ w U,-?O!• ‰„ ω 7.CUỘN DÂY NẰM TRONG TỪ TRƯỜNG BIẾN THIÊN „Jh.?56,?l,-0)*+,-.U,-p3J,-! ξ ‰ dΦ dt ‰ „ ω I5,v ω .Œ φ w T 5:=5E,3FG,-;H,!3I-JKL,M,-N U,-?O!• ‰ „ ω % &'()&( 1.DÒNG ĐIỆN FUCO 3503p5*c7503JKk,?l,-.U,-./.UFg,-p3M,-?s53b0p5*c75 ,|*KE,.U,-./a5],.35E,.39,Oa},O,-cE, 2.HIỆN TƯỢNG HỖ CẢM 56,.Fm,-;>,-?56,V*703,8Ka5],.35E,c8*d3:.I5,3;>,-?56, 0)*+,-V*703p52=8rJ:.U9,3?O.:0?l,-rJ2c75?Fm0-t5c8356,.Fm,- 3Ž0)* 3.HIỆN TƯỢNG TỰ CẢM 35;>,-?56,rJ2*703pj,a5],.35E,@./.3,-;,O-{5rJ2*703 0`,-a5],.35E,@oJh.356,;>,-?56,0)*+,-p35?O-t5;>,-?560)*+,-c8 ;>,-?56,.P0)*@356,.Fm,-,8K-t5c8356,.Fm,-.P0)* 2„Jh.?56,?l,-.P0)* ξ .0‰ dΦ dt ‰ d(LI ) dt !36I^.P0)* a6I^.P0)* ‰ Φ I l.P0)*012*703?56,c8?75cFm,-?b0.UF,-03*+0rJ:,.j,3012*703 ?56,?O?^5=G5IPa5],?s5012;>,-?56,@0O.U}I^a|,-./.3M,-;03j,3 ;>,-?56,.U,-*703-{5rJ2?56,.j03012*703p350Fg,-?l;>,-?56* .U,-*7030O0Fg,-?la|,-*l.?x,=} ^5=G5;4K.3_,-;85@./.UFg,-?iJ.20O!‰ μμ N l I Z 5:=5E,3FG,-;H,!3I-JKL,M,-N l.P0)*012^,-!‰ Φ I ‰ μμ S N 2 l „!;56,.j03*l.=>,- c!035iJ;85^,- !I^=>,-;4K0J^,.UE,^,- μ !?l./.3•*012*M5.UFg,-.U,-^,-;4K 4.HIỆU ỨNG BỀ MẶT 56J+,-ai*b.c8356,.Fm,-p35;>,-?56,02.q,037K.3e;4K;H, .39;356,.Fm,-.P0)*@;>,-?56,3qJ,3Fp3M,-037K.U,-c•5@03†037K .3e*l.cGd*‘,-.UE,*b.;4K 5.NĂNG LƯỢNG TỪ TRƯỜNG 2R,-cFm,-./.UFg,-012;>,-?56,0Mcyd ’‰ L I O 2 2 aR,-cFm,-012./.UFg,-ah.pN R,-cFm,-./.UFg,-!’‰ μ o 1 2 ¿ ,w $ c„‰ 1 2 μ o $ c„ y.?l,R,-cFm,-./.UFg,-!“‰ w lS ‰ 1 2 μ o $ R,-cFm,-./.UFg,-.U,-*l..3k.j03 τ ! 1 2 μ 0 B 2 ∫ τ ❑ dτ X 5:=5E,3FG,-;H,!3I-JKL,M,-N "* *+, -./0.1234562780.72907:50;7<7:=>0;?@A …>,-?56,.3_,-@‰0,I.@;85@?~,-d3_,-=G5p3J,-;4K 39,303f,3y.”@0:007,32@a•p3J,-;4K.},3.5],U2 o2;>,-?56,=G5=y,.^0p3M,-?s5 ⃗ v =JM,--O0=G5;>,- ?56,‘5! a. 35iJ@?tcG,IJh.?56,?l,-0)*+,-• 0 .U,-p3J,-p3507,3”0:03 ;4K*l.?7,; b. 32K‰AD–2‰\0* 5)5! a. 3t,.U<0o.U•,-=G5035iJ ⃗ v …>,-?56,-4KU20)*+,-./0:03,O*l.?7,o0O?lcG, μ oI 2πx @=JM,- -O0=G5p3J,-3FG,-=8.U,- /.UFg,-,8Kp3M,-?iJU2o2.39-5)* "9p3M,-?iJ,E,./.3M,-— * 0`,-p3M,-?iJ 35p3J,-.},3.5],@— * a5],.35E,@d3:.I5,3IJh.?56,?l,-0)*+,- • ‰ ξ .0‰ dΦ dt 3t,=e0.d3:d.JK], ́n 012p3J,- ́ S ‰v2@aw ́n 3FG-=8.U,-@ .+0 ́ S ˜˜ ́ B U,-p3J,-0:03*l.?7,o@chK;)53™d@;85a@Ul,-;o@;56,.j03;„‰a;o W 5:=5E,3FG,-;H,!3I-JKL,M,-N "9;oUh.3™d,E,05./.UFg,-.U,-;„c8?iJ@‰ μ oI 2πx j,3./.3,--{5rJ2;„U~5.j03d34,rJ2a5],I^o./a?],v2Œaw „{;<,-?},3cJy.0)*+,-?56,./@U2p].rJ)!•0‰ μ oIb 2πx ln(x +a) b. 32KI^•0‰ 4π. 10 −7 .10 .5.0,1.10 −2 2π ln 1 2 ‰T@WAD W "‰T@W," +B0;?2C0DE3F0;7:50;36D.1G0 75.4*0120Jl,;4K.U>,@d3_,-@a:,pj,3‰$D0*-~* A ‰\D=>,-0Op3J,-;4K,3‘@;56,.j03„‰A0* $ -~* $ ‰ ADD=>,-j,3.U}0P0?75012IJh.?56,?l,-0)*+,- •0.U,-0Jl,;4K,3‘š•.$.UFg,-3md! 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