1、)2cos(tSB tBSdtdi cos tBS sin tBab cos(D)tabB cost BaBavt Bav RBavI/逆时针逆时针(C)(D)BLvt BLv (A)BR221 BL2)32(21 左左 BL2)31(21 右右CACBBCACABUUU BLBL22)31(21)32(21 (A)BL 221(E)0 SB0 bcbc Bl221 Blac221 caUU Bl221 IRtL)(dtdILL RLII)(t L dtdILL Blv Blat RBlatI nIB tRnBlaSnIS 左左RnBlaS 左左aIB 20 BHw21200022212aIB
2、B21 PQQPRRII2 QPLL2 QPRR221LIW 222121QQPPQPILILWW 21)21(22 (D)(A)LI 221LIW tDjd(位移电流密度位移电流密度)(C)SdtDIl dHL 0SdtDl dHL 1 02Il dHLD)sincos(420j ti tRqE )sincos(42j ti tRqD )cos(sin42j ti tRqj tED0dtDdj(D)SvneI SneIv SnIBfm 负负金属中导电的载流子为电子金属中导电的载流子为电子Bvqf所受洛仑兹力为所受洛仑兹力为:evBfm 大小为大小为:BPMmsinBPMmdBPMddAmsi
3、nBPdBPAmmsin20ndISIPm22)(107.13JBnn转过转过2时时转过转过2时时,显然显然:0sin20dBPAm0abcBR241 KRdtdRdtdabcabc224141顺时针顺时针cb221RB 由中心向外由中心向外BvqF BveBveE 非非vB刚进入时感应电流方向为逆时针刚进入时感应电流方向为逆时针Bbvt Bbv RBbvI RBbvRBbv vava2vatI221RBab a2221nBR 2nBR cabcl dBv)(2)30sin(21lB281lB同选择题同选择题(7)0ac边中的动生电动势为边中的动生电动势为:281lBOa sinBvl acU
4、a0 oaU cosBvlc0 ocUBvlaocacocaacUUUUUUUUU00)()(cosBvlBvl 0 a 点高点高sinBvla 点高点高0 tBS cosdtd tBS sin tBS cos tKIS cos tKS cos KSM maxIM BnndtdILL dtdiM12 21LLM dtdiLL1212 (1)逆接)逆接21212LLLLL MLLL221 05.0205.005.0 0(2)顺接)顺接21212LLLLL 2.0(3)并接)并接05.0 LnIB nIH BHwm21 2221In 221LIW 221LIW 2121LLWW 222121VnVn 21VV 221)(dd 161 垂直垂直相同相同 ll dH ll dEdI SSdtDSdtBS dtdm dtdD xyzHE EH EH00 )62cos(9001041085.8712 t)62cos(39.2 tHES )62cos(39.2 tHyHE EH EH00 )(2cos6001041085.8712cxt )(2cos59.1cxt HES xyz)(2cos59.1cxtHz