1、 1 1. L1 L2 L1 L2 L2 L1 L2 A. 6V B. L2 6W C. L1 L2 W1 W2=2 1 D. L1 L2 Q1 Q2=1 1 2. A B A B 3V . A. B A B.B A C.B A D.B A 3. A. B. C. 0.2A 2 1 D. 2V 1.2W 4. R1 R2 S P a b A. B.R1 C.R2 D.R1 R2 5. P a L 36W P b L 9W P ab L A.16W B.18W C.22.5W D.25W 6. R1 R2 P R2 R2 A.0.45W B.0.50W C.0.80W D.0.90W 7. a
2、0.5A b 3V A. B. 8V C. D. P b 0.6W 8. U R2 R1 3 2 a b R1 A.2 3 B.25 4 C. 5 2 D.4 25 9. R1 2A 3.6W 3A A.1.2W B.2.4W C.3.6W D.4.8W 10. n U R1 R2 . 2 A.I =I B.P =n 2 P C.I =1/nI D.P =nP 11. A. B. C. D. 12. Ll 3V 3W L2 9V4.5W . 2 A L2 . A. 12V B.L2 2A C. L1 6 D. L1 L2 2 3 13. R0 R U P I 14. R1 R2=1 2. S1
3、 0.3A R1 P1 S2 R0 0.8W R2 P2 P1 P2=9 8. A. 12V B.R0 40 C.R2 20 D.R0 3 2 15. S1 S2 V1 V2 5 3 S1 S2 R1 R3 3 2 A. R1 R3 2 3 B. R2 R3 5 3 C. S1 S2 V1 V2 3 2 D. S1 S2 R1 R2 1 1 16. 8V . S P R0 1.6W 0.4W A. 2V 4V B. 3V 6V C. 3V 5V D. 4V 6V 17. A B C A B 3 C A B C RA RB Rc RA=RcRB S ( ) A B C TA TB TC ( C
4、C ) A.TA TB TC B.TA TC TB C.TC TA TB D.TA TB TC 18. L 1.0A 2.5V 0.3A S1 A1 A2 0.3A S2 A1 0.4A A. A2 0.3A L B. C. S2 0.1W D. A2 0.18A 19. 6V V A. 6V B. 0.4A 3.6V C. 0.75A D. 6.6W 20. L1 L2 U L1 4W L1 9W. . A. L1 2 3 B.L1 L2 2 1 C. L1 L2 2 1 D. 3 2 21. 5 4 2 1 1 2 A.5 2 B.5 4 C.2 5 D.10 1 22. U P r A.
5、P B. r U 2C. 2 2 U r PD. 2 2 U r P P 23. S1 S2 I :I 1:3 P1 S1 S2 P2 A. R1:R2 2:1 B. S1 S2 R1 R2 I1:I2 1:2 C.Sl S2 U :U 3:1 D. P1:P2 9:2 24. . 200g 10cm g=10N/kg J W. 25. R0 P0 R PR PU I a b c b R0 P0 I PU I U U V R0 4 26. 6V R R P 1.5 V L P a Ua Pa P b Ub Pb Ua Ub =2 3 Pa Pb=8 9 p a b ). 27. 10min 5
6、min . . . 10min _kW.h 30min _ kW. 28. R2 2V R2 P2 3V R2 P2 P2 P2 9 V. 29. R0 R1 . . V W. 30. 1 U I 2 2.5V 4.5V W 3V . 31. 3V 2.5V. 1 M V . 2 P . 3 I U W. 32. L 1 S P U/V I/A 5 2 L AB AC AD UAB UAC 0 UAD 0 _ AB BC CD 3 _W. 4 5 P1 P2 P1 P2 6 2V 2V 33. S1 S2 L S1 1.2A, U1 S2 , R2 7.2W U2 R2 1.8W U1 U2
7、1 R1 2 3 L 34. . 1.5 2A 540g 10m/s . 20s . 1 2 3 4 .( g=10N/kg) 35. S S1 S2 S3 1 2.0 0.17 2 2.5 0.20 3 3.0 0.22 6 I 1 S S2 S1 S3 I 0.4A 2 P I 0.6A 3 S S3 S1 S2 P a b R1 . 2016 1.AB 2.C 3.D 4.ACD 5.A 6.A 7.D 8.C 9.C 10.B 11.BD 12.C 13.C 14.A 15.D 16.D 17.C 18.D 19.B 20.D 21.A 22.C 23.D 24.0.2 0.1 25.
8、a 3 1 26.10 10 27.0.03 0.5 1.41 28.6 29.50 12 3.6 30.12.5 0.5 40 6.8 31.3 b 7.5 0.625 7 32.(1) (2)CD(3)0.5(4) 5 6 20 33. 2 S1 2 S2 2 2 1 R1 3 1 I I 2 1 U U 1 4 I3 4 1 I1 4 1 1.2A 0.3A R2 2 3 2 I P A A W 3 . 0 3 . 0 8 . 1 20 U 1 3 I I L R R R R 2 1 1 4 13R1 R2 RL R2 2 2 P P 2 3 2 2 I I W W 8 . 1 2 .
9、7 1 4 3 2 I I 1 2 U 2 3 I I L R R R R 2 1 2 2 1R2 R1 RL RL R1 R2/2=10 2 U U1 I1R1 1 10 12V 3 PL L 2 R U V V 10 12 12 14.4W 34.P =I 2 R=(2A) 2 P P =P +P =6W+54W=60W U=P /I=60W/2A=30V Q=I 2 Rt=(2A) 2 W W =P /W =1080J/1200J=90% 35. 1 S S1 S2 S3 L U=UL=9V P=UI I=IL= = =1A I= RL= = S S2 S1 S3 R1 L I 0.4A 0.4A=1A 0.4A=0.6A PL 2 RL= 0.6A 2 R= = R1=R RL 2 P 8 1A I =0.6A Rab 3 S S3 S1 S2 P a R1 R1 P1= = =13.5W b R1 = =0.25A R1 P1 2 R1= 0.25A 2
