大學(xué)物理與實(shí)驗(yàn)I8電磁感應(yīng)及電磁場(chǎng)

1、qqabe-不能形成穩(wěn)恒電流不能形成穩(wěn)恒電流ababefkfeabkl deabefkfkekelkl de-非靜電場(chǎng)是一個(gè)非保守場(chǎng)非靜電場(chǎng)是一個(gè)非保守場(chǎng)1.實(shí)驗(yàn)現(xiàn)象觀察實(shí)驗(yàn)現(xiàn)象觀察nnsnsndtdif riii21ttiidtiq211dr)(121rdtdr1)(21ndtddtd =nn21dtdidtdn)()()(21dtddtddtdniiiniindtdimimnibr0nnbsnisnr0dtdidtdinsnr0v75. 0iriii275. 021ttiidtiqtiic75. 0a38. 0miabcd1l2lxviabcd1l2ldrrsdbddrlri102ssdb

2、2210lxxrdrilxlxil210ln2dtdidtdxlxxlil)(22210)(22210lxxvliliabcd1l2lxlxil210ln2b 00aabn2cosbstbacos2ntba2cos2dtdnintnnba2sin220302ntnnbai212sinntnnbai2max2slrsna4)(21rnqi)180cos0cos(0202babarnrnba222basntnnbai2sin22abcd外fvbsbbsblxldtdi)(blxdtddtdxblblviabcd外fvblibvef)(bvabf-形成逆時(shí)針?lè)较虻母袘?yīng)電流形成逆時(shí)針?lè)较虻母袘?yīng)電流fk

3、eebve )(bveklkil deabkl deabl dbv)(blvvbabke 0iilil dbv)(vfbvekdtdi2. lildbv)(oaldl dl ldl dbvdi)(vbdllbdlloiidlolbdl221bl2021bluuaoal dloaaooa abdsddbl221dtdi221lbviabalvxdxxdiabalvxdxxdbvdi)(bvdxvdxxi20laaixdxiv20alaivln20-渦旋電場(chǎng)渦旋電場(chǎng)nlkil dedtdissdbdtdssdtbsdtbl delsk r0rlkdtdl de)(2sbdtdrekdtdbr20b

4、dtdbrrek22dtdbrrek221 r0rkerdtdbrek2ma1r2rr0r)(sbdtdi解解: : dtdbr2ma1r2rr0r21rrii212i2ir0ma1r2rr11irmuau2112rrriidtdbrrrrr22112)(2r0ma1r2rrteiti0)(ilvabcdhytitb2)()(0ilvabcdhy ssdbt)(lhhxdyyti2)(0hlhxtiln2)(0dttdi)()(ln20dtdxixdtdihlhhlhtveitln) 1(200hlhxtitln2)()(0動(dòng)感islydbvsdtb)(lhhhlhdyytivxdyytidt

5、d2)(2)(00ilvabcdhhlhtveitln) 1(200hlhveihlhtveittln2ln20000金屬杯金屬杯金屬塊金屬塊1b2b1i2i12121i12121imdtd212dtdim1212004rrlidbddtd121dtdim2121221mmm1l2l111inb111ilnsbn122111221lirnn12121im1221lrnn221vnn222inb222iln1l2lsbln221122221slinn2221vinn1l2l21212im221vnnmmm2112dtdimi1dtdilrnn1122122121vnnmr1cr2c/sr cm1

6、 . 1rr rinb2220bsn112rsinn222102 . 021041005010447h1028. 66212imrsnn2210r1cr2c(2)a/s502dtdiv1014. 34dtdim21lidtdldtdili-反電動(dòng)勢(shì)反電動(dòng)勢(shì)dtdill(3) -電磁慣性電磁慣性nib0nbslrin220illrn220vn20iln0i2r1ririb20ssdb21rrbldr2120rrrdril120ln2rrili2r1rilabcdill120ln2rrlk21rl0000020ittlididtriidt2002210lidtritlk21rridtdil002t

7、dtri00tidt2021li200202100lidtriidtttlidtadl00ilidia-等于電流增大時(shí)等于電流增大時(shí) 反抗反抗 l所作的功所作的功lidi2021lilk21rldtdill221liwmnibvnl22221vinwmvb221vmwmwbh21221 b221hvmmdvwwvbhdv2122 rirh0rr2021hwm422208rridvwdwmmrldrrri2842220drrrli34204rrvmmdvwwrdrrrli0342041620lilwwmm1620ii2r1ri16201iwmrib200221bwm22208rivmmdvwlw

8、12212812220rrrldrril1220ln4rri21mmmwww122020ln416rrii22208riwmi2r1rilmkdtdl deledtdl dh?riirii2s1sllil db0ll db0drii2s1sdsdsqdtdqdtddi dtdddtdiddsdtdsqdtd dj證：證：sdtdqsdjsqsddssdddtddtdqssdtdsssdtdsdj0)(ssdtdj21)()(sssdtdjsdtdjtdj- 永遠(yuǎn)是連續(xù)的永遠(yuǎn)是連續(xù)的ssdtddtdqsdtdqsdjldiil dhsssdtdsdjldsisil dh曲面，取曲面取，21dii hrii2s1ssdtbl delsksslsdtdsdjl dh(2) hsqsdd0. 1lmdtdl de. 2ssdb0. 3ldiil dh. 4vdv