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江苏省南通市 2011 届 高三第一次模拟考试讲评 .

江苏省南通市 2011 届 高三第一次模拟考试讲评. 一、单项选择题. 1 . C 2 . A 3 . C 4 . B 5 . D 二、多项选择题. 6. AD 7. AB 8. BD 9. BCD. A B C D 4 3 6 3 1 4. b. M. N. a. -. 2 题 A. W Fab = Δ E kab <0. -W Fab = Δ E pab > 0. F. v. -Q. kqQ/r 2 =ma. E.

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江苏省南通市 2011 届 高三第一次模拟考试讲评 .

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  1. 江苏省南通市2011届 高三第一次模拟考试讲评.

  2. 一、单项选择题. 1.C 2.A 3.C 4.B 5.D 二、多项选择题. 6. AD 7.AB 8.BD 9. BCD

  3. A B C D 4 3 6 3 1 4

  4. b M N a - 2题A WFab=Δ Ekab<0 -WFab=Δ Epab >0 F v -Q kqQ/r2=ma E a=kqQ/mr2 ∝1/r2 aa<ab

  5. A B CD 13 2 1 1 2

  6. 3题C v船-v水≤V合≤ v船+v 水 V船=5 V合=4 V船=5 V水=3 tmin=d/V船=30/5=6s 2m/s≤V合≤ 8m/s

  7. 5题 D GmM/r2=ma a=GM/r2 ∝1/r2 a1/a2=r22/r22 GmM/r2=mω 2r ω2 ∝1/r3 ω1/ω2=r23/2/r23/2

  8. A B C D 2 3 6 3 5

  9. u R1 R2 L A2 A1 。 。 6题 AD u=Umsin2πft I1=U2/R1∝ U1∝ Um XL∝ f I2=∝ 1/xL∝ 1/f

  10. A B C D • 10 6 28 • 3 7 4 33

  11. v P 7题 AB a=μg a=μg不变 f=μmg kx a=(μmg+kx)/m a f=μmg V=0 v a a=(kx-μmg)/m kx v a f=μmg a=(μmg-kx)/m kx v a=μg 不变 f=μmg f=μmg

  12. A B C D 3 4 8 12 1 9 13 18

  13. R A . . . . . . . . . . . . . . . . E,r B 8题 BD qvB=q(E/d) E=Bdv E=Bdv=I(R+r) P r=Bdv/I-R R I=Bdv/(R+r) I=Q/t=nq η=I2R/IE=IR/E=IR/Bdv

  14. A B C D 13 8 26 15 12 8 23 12

  15. 9题 BCD C A B D P P EP Ek t t h h 0 0 0 0 vy2=2gh v0 P=mgvy=mg2t ∝t h P=mgvy P2=2mg2h H vy v EP=mg(H-h)=mg(H-gt2/2) Ek=mv2/2=m(v02+vy2)/2=mv02/2+mgh

  16. 8,3 21,18 33,39 2,5 18,15 10、(1) D1=1.3cm +10×0.05mm =1.3cm+0.50mm =1.3cm+0.050cm =1.350cm D2=6.5mm +29.0×0.01mm =6.5mm+0.290mm =6.790mm Δs=SBD-SOA=18mm=1.8×10-2m 10、(2) =at2=a×0.22 a=0.45m/s2

  17. 3,0 9,15 2,3 若选R1: IR1=E/ R1=12/5=2.4A > 2A

  18. 12题 B(3-4) θ =30º n =sin45º /sin 30º A n 红< n绿 θ 45º 60º n红=sinr /sin 30º δ= 30º 30º δ=r- 30º C B A B C D 5 6 17 6 8 12 1,2 4,9

  19. 12题 B(3-4) θ =30º n =sin45º /sin 30º A θ n 红< n绿 45º 60º δ= 30º 30º n红=sinr /sin 30º C B δ=r- 30º

  20. y t 0 1 2 3 4 5 6 y/cm 6 x/m 0 -6 T=λ/v=4/20=0.2s S=(t/T)×4A=4×4×6=96cm P

  21. B 4mv=14m×v/4+mv′ v′=v/2

  22. 13题 F A B FAB a fB=μBmBg fA=μAmAg fA fB a=2m/s2 对AB: 对B:

  23. 14题 c d a b Ⅰ 2L Ⅱ B B v v a=g L v vm

  24. 15题 (1) qv0B=mv02/r 2分 r=mv0/qB 2分 (2) r1 300 r1 (3) 2r1=Lsin600/2 600 v1=qBr1/mqB r2 v2=qBr2/mqB

  25. D 16题 qE C O B A E mg (1) Vcmin=0 (2)

  26. D C O B A E (3)

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