1、 - 1 - 1 2 0 1 5 2 2 18 . 48 4 2 0 1. 40 kg 48 V 75 kg 12 A 20 km/h 350 W A 576 W B 4 C 104 N D 63 N 2 , S , P a , A.V 1 V 2 A 1 A 2 B.V 1 V 2 A 1 A 2 C.V 1 V 2 A 1 A 2 D.V 1 V 2 A 1 A 2 3 A-10-45-11 A B C P ( ) A A B C B A B C C D 4 R 1 =10 R 2 =8 S 1 0 20 A S 2 A 0 28A B 0 25A C 0 22A D 0 19A 5
2、A B t n B R A I= t ne B I= t ne 2 C I= t ne D I= t ne 2 6 图 A-10-45-11 - 2 - 1 a b 2 a b 3 a b 4 a b A 1 2 B 3 4 C 1 2 4 D 7 R g =500 I g =1mA 10V 100V R 1 R 2 A 9500 9.95 10 4 B 9500 9 10 4 C 1.0 10 3 9 10 4 D 1.0 10 3 9.95 10 4 8 U/V 0.60 0.70 0.80 0.90 1.00 1.10 I/A 0.18 0.21 0.25 0.27 0.30 0.3
3、3 9. Ic, IIc ( R 1 =0 ) ( R 1 =3 ) Ic=1.2A R 2 =6 L 6V 6W E=8V r=2 L L 2 0 0 8 1 1 0 3 - 3 - A R 2 4 /7A B L C L R 1 4A D L R 2 2 / 3A 10. R 1 R 2 R 3 R 4 S C R 4 A C B C C R 4 D R 4 11. U C A U C C U B U C C U C U C C U D U C C U 12. 10 1 abcd ab L 1 ad L 2 I R I II R = ( ) A L 1 L 2B L 2 L 1C L
4、1 2 L 2 2D L 2 2 L 1 2 1 2 3 4 5 6 7 8 9 10 11 12 S R 1R 2R 3R 4 C Er - 4 - V K r E, 0 R R 3 30 13 8 E r r 2.00 R 0 1 2 K R / 40.00 20.00 12.00 8.00 6.00 5.00 U/V 1.90 1.78 1.66 1.57 1.43 1.35 I/A 0.047 0.138 0.196 0.238 U I 3 E =_V 1 r = _ 1 4 _ 2 A B R 0 C D 14. 16 1 R 3V 1 10 ( 100 1 ) 2 A A1 3
5、00mA 1 B A2 0.6A 0.3 C V1 3.0V 3k D V2 15.0V 5k E R1 10 F R2 500 - 5 - G E 4V H _ _ _ 3 _ _ V A R V A R V A R V A RA B C D 4 ( ) 15. 6 2010 “ ” I U U/V 0.00 0.40 0.80 1.20 1.60 2.00 I/A 0.00 0.10 0.18 0.28 0.38 0.48 A A 1 0.6A 1 . 0 B A 2 3A 0 . 1 C V 1 3V 3 k D V 2 15V 1 5 k E R 1 0 1 0 2A F R 2
6、0 2 k 0.5A 14cm 2B E 6V - 6 - I U 3 32 16 (10 ) E=20V r=l R=4 3V, 6W L RD=0.5 D . (1) (2) (3) 17 10 R 1 R 2 Oa Ob E=7.0V 1 R 3 R 1 R 2 R 1 R 2 R 3 2 R 3 A B R 1 R 2 18 12 “ ” 10-17 AB AB A 1.5 0.5 U/V 2.0 0. 1 0. 2 0. 3 0. 4 0.5 0 I/A 1.0 2.5 2B - 7 - 8V m=0.1kg k=20N m E=10V R=40 l=8cm P R A B
7、(1) (2) R 0 ? (3) R 0 A B U V a (4) R 0 1 AD 2.A 3. BD 4 C 5 A 6 C 7 B 8. B 9.BD 10.B 11.C 12.D 13 8 2 2 0.089 0.270 3 3 2.00 1.982.02 0.45 0.400.50 2 4 AD 1 14 1 1 12 2 A C E - 8 - 3 B 4 15 6 1 ACE 2 2 2 3 2 16. L 6 2A 3 L L P I U UD=E I(r+R) UL=20 2 1 4 3 7V P IUD 2 7 14W P I 2 RD 2 2 0.5 2W P P
8、 P 14 2 12W 17 10 1 R 1 R 2 R 3 R 1 R 2 R 1 =R 2 2 I=2.5mA 1 R 1 R 2 U 1 =U 2 =2.5V 1 1000 1 2 1 I U R R 1 R 3 2 2 1 3 U U E U V 1 800 3 3 I U R 2 2 R 3 A B R 3 =0 1 7 2 1 E U U V 1 R 1 R 2 3 1 U V 4 2 U V R 1 2 1 1 10 05 . 1 IU P W 2 R 2 2 2 2 10 4 . 1 IU P W 2 18 (1)P 4cm 0.04m -8m s 2 a 8m s 2 (2) P 8V R o (3) a x= a x= 2 01 . 0 4 . 0 20 m/s 8 m kx a 10 , 8 2 , 2 Ro R Ro V k ma a k ma x U 5 . 0 4 100 4 08 . 0 04 . 0 8 k ma A 1V 1 S R 1E 2B 1.5 0.5 U/V 2
