1、 (1 4 5 6 ) 1 ( 2015 2016 ) 09152072 ( C ) A B C D E n t E ABD C 2 L B v BLv 09152073 ( D ) B L v E BLv A B v B C B L E 0 D D 3.( 2014 2015 ) 09152074 ( B ) A B B A C B D A A A B C D 4. l z y B B z v y 09152075 ( A ) A 0 B 1 2 Blv C BLv D 2Blv l 0 5 ( 2015 2016 ) t 09152076 ( CD ) A B C 0 t0 t0 2t0
2、D E n t E 0 A E B 0 t0 E1 t0 2t0 E2 C D 6 ( 2014 2015 ) A B 09152077 ( BC ) A 0 0.1s 0.15Wb B 0.5V C A D B A A 0 0.1s 0.05Wb A B t 0.15 0.10 0.1 Wb/s E N t 0.5V B C B A A C D 7 ( 2015 2016 ) MN M N L 0.2m M M R C L R ab B 0.5T ab ab s 0.4m Q 0.01J 09152078 (1)ab v (2) q (1)5m/s (2)10 6 C (1) ab E I
3、ab s t E BLv I E 4Rt s vQ I 2 (4R)t v 4QR B 2 L 2 s 5m/s (2) U U IR q CU q CQR BLs 10 6 C (1 3 4 5 ) 1 ( 2014 2015 ) B L f a b a E 09152079 ( A ) A E fL 2 B a b B E fL 2 B a b C E fL 2 B a b D E fL 2 B a b ab v v /2 fL E BLv fL 2 B a b A 2. r B R 09152080 ( B ) A r 2 B RB r 2 B 2RC 0 D r 2 B 4R B r
4、2 B r 2 2 1 2 B r 2 q R r 2 B 2R 3. 0.5m MN 0.2kg 0.5 0.8T MN MN ( g 10m/s 2 0.6) 09152081 ( B ) A 2.5m/s 1W B 5m/s 1W C 7.5m/s 9W D 15m/s 9W mgsin cos B 2 l 2 v R r v 5 m/s I Blv R r 1A P I 2 R 1 W B 4. v MN M 09152082 ( AD ) A S B S C S P D S P S N M M N M N M N A D 5 ( 2015 2016 ) U R0 B L m AC F
5、 d v AC r 09152083 ( BD ) A AC UAC 2BLv B AC UAC 2BLvR0 R0 rC Q Fd 1 2 mv 2D R0 q 2BLd R0 r AC 2L AC E B L v 2BLv AB U R0 R0 r E 2BLvR0 R0 r A B Fd Wf Q 1 2 mv 2 Q Fd 1 2 mv 2 Wf C I E r R0 B2Ld t R0 r q I t 2BLd R0 r D 6 ( 2014 2015 ) (MRI) r 5.0 cm A 0.80 cm 2 B 0.3 s 1.5 T 09152084 ( ) (1) R (2)
6、E (3)0.3 s Q 3 2 V 8 J (1) R r A R 3 (2) E B r 2 t E 2 V (3) Q E 2 R t Q 8 J 7 P Q L1 B1 ef P Q m r L2 abcd a b B2 a b 09152085 (1) ab Iab (2) ef v (1)Iab 3mg 4B2L2(2)v 3mgr 4B1B2L1L2 (1) I ab Iab dc Idc Iab 3 4 I Idc 1 4 I mg B2IabL2 B2IdcL2 Iab 3mg 4B2L2 (2) (1) I mg B2L2 E E B1L1v ad dc cb ab R R 3 4 r I E R v 3mgr 4B1B2L1L2
