physics chapter 7-電流-2018-學生版

1. Samn http://mysecretpark.blogspot.tw/ 12/27/2017 7 Electric current z ELECTRICCURRENT () - 18 (DC ) (//) From:http://www.ehow.com/info_10005178_negative-electrostatic-effects.html

2. 7-2 Electric current REVIEW AND SUMMARY

3. 7-3 Electric current 7.1 1. () 2. 3. 4. 5. -() 6. Electric current 1. 2. 3. q i t () 4. 1 1 1 6.251018 1 210-7 mA10-3 A A10-6 A 5. V1 V2 +- i i i 7-1 7-2 () - -

4. 7-4 Electric current 6. 7-3 . Battery 1.1800 - 7-5 2. r ( internal resistance) 3. V(terminal voltage) 4. r 5. 7-4 19 From Wiki

5. 7-5 Electric current (Electromotive force , emf) 1. 1825 1826 electromotive force 2.() () eU Q ,V 7-7 . 1. V i r V i r 2.= + - p q 7-6 7-8

6. 7-6 Electric current 1. 20 1.01019 H 2.51019 SO4 2 (1)(2) (1)0.48A(2)31018 H2SO4 2 mA (1) H (2) SO4 2 41018 3.51018 1.2(A) 2.- 1.5 V 2 13(1)(2) (1)I=0.1(A) (2)1.3(V)

7. 7-7 Electric current 1. 0.1 0.16 2. 6 0.5 1 3. 6.251015 4. e0 r T 5. 8.010-16 4.010-12 0.010 6. 20 30 (1)/ (2) 3 5 7.xy a xy I [100.] (A) a (B) a (C) 2 a (D) a (E) a 2 1. 1018 2. 180 (J) 3. 10-3 (A) 4. T e 5.50(V) 6. (1)1.5(V/m) (2)18(V) 7.B

8. 7-8 Electric current 7.2 1. 2. 3. 4. (Ohms Law) 1. 2. V const I R () 7-11 .. 7-12 7-9 V I 7-10 --

9. 7-9 Electric current (resistance) 1. 2. L R A R L 1 R A 3. 4. resistivity ( ) 0 (1 )T .m ,Conductivity 1 5. 10 C 1 7-14 1 Electronic Devices,Floyd 7-1 (200 C) .m K-1 1.6210-8 4.110-3 1.6910-8 4.310-3 2.3510-8 4.010-3 2.7510-8 4.410-3 9.6810-8 6.510-3 6.4102 2.610-1 3.9106 7-13 A L i

10. 7-10 Electric current 1. 1 2R R R 1 2V V V 1 2I I 2. 1 2 1 1 1 R R R 1 2V V 1 2I I I 3. R ( Serway ) 1. 2. () 3. 4. 5. 7-15 7-16 7-17 Drude model From wiki

11. 7-11 Electric current 3.- 110 50 (1) (2) 5 (1)2.2A (2)250V 55 110 5 600 C3.751021 4.- L V1 3L V2 (1)V2 V1 (2)? (1)9(2)3 12 21 (1) (2)(3)(4)(5) (1)12(2)11(3)19(4)29(5)19

12. 7-12 Electric current 5. 2mm (1) 20(2) 50( 0 = 1.72108 m = 3.9103 / C ) (1) 5.4103 (2)6.02103 1 0.1 (1)20 (2)100 20 10x10-8 m 0.4x10-3 / 11.03 6. ABC 1268 36 V(1)(2) AB 12VR1=R4= 3, R2=R5=1, R3=4

13. 7-13 Electric current 1. l2VR1=R4=3R2=R5=1 R3=4? 2. (1)AB (2)AC 3. V12 XY R 4. (1)(2) 5. ab Rab ac Rac ab ac R R 6. 21 13 32 7. E1 1 3 E2 E1E2 8. L V1 3L V2 (1)V2 V1 (2) 9. R 23 32 10. A E / 6 1 12A B 20 R1 R2 R3 R4 R5

14. 7-14 Electric current 11. ? 12. gh 1 ab 13. S I0 Ic I0 Ic (A) A8IO A9IC (B) A6IO A8IC (C) A8IO A6IC (D) A9IO A6IC (E) A9IO A10IC [94.] 14. ab [90.] 1. R1R2 2A R3R4 R5 1A 2. (1)4 (2) 25 24 3. 25 4. (1) 3 2 (2)15 5. 3 5 6. 14 7. 91 8. (1)9 (2)3 9. 278 10. EA 11. 4 12. 30 13.A 14. 8 1 12 V 21 S 2

15. 7-15 Electric current GEORG SIMON OHM Georg Wilhelm FriedrichHegel, 1770-1831 idealism 1827 1841 1791-1867 1845 1849 -1854 7 6 1. Wiki, http://en.wikipedia.org/wiki/ 2. ,, 3. 7-18

16. 7-16 Electric current 7.3 1. 2. 3. 4. 5. 1. ()() () 2. 3. () E P V I t V I Q I t Q I t eU Q V P eU Q V I t V P I V t t t 1. 2 2 V P IV I R R 7-20 From wiki 7-19 R R

17. 7-17 Electric current - 2 input clientP V I I r V I 7-21 From https://goo.gl/QDe3wx 1.1 1 1 1000(W)3600(s)=3.6105(J) 2.

18. 7-18 Electric current 7. 1.5 V 5(1)(2) (3)20 (1)0.45(W) (2)0.45(W) (3)540(J) 110 V800 W 30 (1)(2) (1)7.3A (2)0.4 1.5V 0.10 R 0.60A(1)R ? (2) ? (3)? (4) ? (1)2.4 (2)1.44V 8. B =12V A 2 4V R 12 M 1 2V (1) R 3W (2) A 1.5W (3)0.75W B A R

19. 7-19 Electric current 24 V 1 2 15 R 6 V (1)(2) 1. 100 W200 100 2.AB 110V50W 110V100W (1)(2) 3. V R A B 4. R1 () 5.0 (1) R (2)(1) 6. 6.3 0.6 3.6 (1) (2) 7. O AB 90o R1ABC R2ADB 8. 2 5 200 9. 100 100 abcde 200 abcde

20. 7-20 Electric current K 10. 6.2 2 1 5 11. 10 0.50 80 240 C 12. (A) 12 (B) 5.8 (C) 0.86W (D) 0.43W (E) 2 [91.] 13. 220 1 (A) 88000 (B) 220 (C) 88 (D) 2.2 (E) 1 .5 [95. ] 3.0V 0.30 0.25 0.20 0.15 0.10 0.05 0.00 1.0.25 2.(1)A (2)B 3.D 4.CFG 5. (1)R0 (2)12W 6.(1)6V (2)0.5 7.31 8.50 9.d 10.0.67 11. 20 0 20 40 60 10 0

21. 7-21 Electric current 7.4 1. 2. 3. 4. 5. 6. 7. Galvanometer 1. 2. 3.(ch 8) Ammeter 1. 2. 3. 4. i R r A A i R r r rr 7-24 7-25 G

22. 7-22 Electric current Voltmeter 1. 2. 3. 4. RV i R R R r 1 RV r R i V i R R R r 1 1 1 VR R r 1. n R 1 Ar R n I 2. n ( 1) VR n r V r 7-26

23. 7-23 Electric current 1. = A V R R R i AR R 2. 1 V RV R RI R RV>>R 3. Wheatstone Bridge R1R3 R2 BD VG Rx R1R2R3 BD 2 3 1 x R R R R 7-27 + - A B R A V + - A B R A V

24. 7-24 Electric current 1. ACV/ DCV/ 2. -/ 7-28 3. DCV Step 1. V/ COM Step 2. DCV DC 1000V Step 3. Step 4. ACV Step 1. V/ COM Step 2. ACV AC 750Vrms Step 3. Step 4. 7-29 Sir Charles Wheatstone1802 2 6 1875 10 19 From Wiki

25. 7-25 Electric current DCA Step 1. mA 200mA 10A COM Step 2. DCA Step 3. Step 4. Step 1. V/ COM Step 2. OHM Step 3. Step 4. 9. 1000 0.02 4 250

26. 7-26 Electric current 10. Rx R1 MN P G S R3 R4 MP PN (1) S P (2) P R4 R3 (3) xR (4) [96.] ab ______ G S Q M R3 R4 R1 Rx N P

27. 7-27 Electric current 1. (1) R ?(2) R=2 1 AB ? 2. 1 ab 3. R1 R2 ? AB (A) R2 R2 R1 (B) (C) 2 MB BN R2 R1 2 1 (D) R2 BN [] 4. ? 5. () AB () () 6. () ab

28. 7-28 Electric current 7. S V 12 A 8. 2.4 20 15 9. 1 R I-V XY Z (A) X Y Z (B) X Y Z (C) X Y Z (D) X Y Z (E) X Y Z [93.] 1.(1)6 (2)22V 2.3 3.ABE 4.0.72 5.4 6. 11 8 7. 0.9 8. 3.8 9. B

29. 7-29 Electric current () 1. 2. - 3. 4. Y () 3 2 1 1 2 3 ( ) AB R R R R R R R Y 3 2ABR r r 3 2 1 3 2 1 2 3 ( )R R R r r R R R BC 1 3 2 1 3 1 2 3 ( ) BC R R R R r r R R R AC 1 2 3 1 2 1 2 3 ( ) AC R R R R r r R R R A B C D E F G H I I

30. 7-30 Electric current 11.- MN RM N ______AB AB ______ ( 3 1)R( 3 1)R AB 8 12. 12 R (1) AG (2) HF 5 3 (1) (2) 6 4 R R 13. Y A B C D E F G H I I

31. 7-31 Electric current ABCDE 10 5 5 10 5 X Y 7 AB (A)15 (B)5 (C) 3 10 (D) 10 7 (E) 7 10 C A B C D E 10 5 5 5 10 X Y

32. 7-32 Electric current () 1. electric circuit, 2. 3.() 1.() ()() 2.() () 7-30 1 2 7-31 4.() in outI I 7-32 a b i R a b i R a b r c d R a i V

33. 7-33 Electric current 1845 1847 1859 1862 1. Wiki, http://en.wikipedia.org/wiki/ 2. ,, 3. 4. 7-33

physics chapter 7-電流-2018-學生版

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