1、 - 1 - I I 2 M P I 1 N Q O U 1 U 16 (12x4 =48 4 2 0 ) 1 2 R1 10 R2 8 S 1 0.20 A S 2 ( ) ( ) A 0.28 A B 0.25 A C 0.22 A D 0.19 A 2 G R A R R B R R C R R D R R 3 10 A 58 A 12.5 V 0.05 A.35.8 W B.43.2 W C.48.2 W D.76.8 W 4 36W 36V 18 V . 36W B. 9 W 36W C. 9W D. 9W 5 I U P PN PQ U PM I A B P R U1 I2C
2、P R U1 I2 I1D P PQOM 6 0.6 A 0.1 3 V 6 k 3 V R G - 2 - ( ) 7. A B R A B U I t W P = I 2 R R U P 2 P = IU t W P 8 V1 V2 R a b 12.7V 12.3V A a b 12.7V B a b 12.3V C V1 V2 D V1 V2 9 . 2 2 ( ). (A)100 100 (B)200 100 (C)50 100 (D)100 200 10 2005 IC IIC R1=3 IC=1.2 A R2=6 L 6V 6W E=8 V r=2 L A V 5 A A V
3、 2.5 V C A 3 B V G D - 3 - A R1 4 3 A B C R1 2 A D R1 3 4 A 11 AB O r.O AB A B 9 V A O B V. A B A V C 3 V 3 3 g D 12 36W 36V 18 V . 36W B. 9 W 36W C. 9W D. 9W 3 2 28 13 (8 ) U I : 1 2 3 4 5 6 7 8 U 0 0.50 1.00 1.50 2.00 2.20 2.60 3.00 I 0 0.050 0.100 0.150 0.180 0.190 0.200 0.205 (1) I U . (2) . (
4、3) . (4) V A - 4 - 14 10 1 A 2 3V B 03A 0.025 C 00.6A 0.125 D 03V 3k E 015V 15k F 020 1A G 02000 0.3A H 2 2 3 A ab B bc C de D gh 4 5 U-I 3 E=_V r _ 15 10 =1.7 10 8 m 1 _ a + 2 - 5 - 9 b A B C D _ _mm _m _. 3 34 16 13 R S m q S d 1 E 2 q / 17 A R r =1 R=19 A V 5 0 0 0 /V 2 5 0 0 / V Na 2.5 5.0 2
5、.5P V OFF 100 10 1 2.5 10 50 250 500 500 250 50 10 2.5 1 10 100 1k V V mA + AVR x RPABESAAVR x RPABESBAR x RPABESCAVR x RPABESDV a b 0 25 20 30 - 6 - r =0.5 K1 K2 684W K1 K2 475W 1 2 K1 K2 3 K1 K2 18 A B C d A B R R m A d P C 1 B 2 P B 1. C 2 0.19 A D 2 V 0.25 A A B C 2.D 3.B 4.B 5.ABD 6 AB 7 .A B
6、 8AC 9. C 10 BD 11.CD a gtan A A V B 3 V 30 a gtan 30 3 3 g C U E 2 2E a gtanU 2E 12.B 13 (2) (3) . 14 1 ACDFH 2 2 2 3 A 2 4 2.75 1.90 2 15 D 0.260 mm 0.258 0.262 mm 12m 13m V A - 7 - . 16 1 S U E R R E U 3 2 5 . 1 3 mg d qU 3 q mgd E 2 3 3 2 S U / 2 2 / E R R E U 3 0 2 2 / / / U q d mg U q 3 q q 6 7 / 3 17 1 E=120V 2 I =20A 3 P=1700W 18 1 4 . 4 E R R E U AB 4 3E U CB . B 0 2 1 2 2 mv qU d mg AB C mg.3d+qUAB-qUCB=0 gd v 7 (2) B mgd d mg mv qU E AB 2 3 2 . 2 1 2
