1. SC 134 2. The Biot Savart s Law 3. R I 4. (vector) 5. 2 0 2 0
2 0 sin 4 sin 4 4 R rsdI dB u R rsdI Bd R rsId Bd u 6. 2 0 2 0 2 0
sin1 4 sin1 4 sin 4 R dsI dB R dsI dB R rdsI dB 7. RdRdds dRRdRdds
Rs R s 0 8. 12 0 2 1 0 2 1 0 2 1 0 2 0 2 0 coscos 4 cos 4 sin 4 sin
4 sin 4 sin1 4 R I B R I d R I dBB R dI R IRd dB R dsI dB 9. R I B
R I R I B R I B R I B 2 )2( 4 11 4 0cos2cos 4 coscos 4 0 00 0 12 0
2,0 21 10. N R NI B 2 0
