2015中考物理电功、电热和电功率二轮复习题(附答案)

2015 - 1. A. B. C. D. 2. A. bcd 3.61.0m160 22000 401000 365= 1.0103kg / m3g 10n / kg A. - B. 6.1104pa C. - D. 1.61010kw; H A. 37b40w C.1nm d50hz 5. abcdd A. b d.cd - A. b C. Ac Wwdj 8. A. bcd 9.BA800wB1200w A. B B. BB. C. BB D. BB 10.2014;- E. C F. 11.2 w-100 200.6 - 2014629 2014699 89 pass1a2a;s s1pb4.5vl w;lv 13.; 14._ 11040.1a100s _j 6v 3w121a6v p 16.ar Br0 17. 2.5v 1a bcd v 2 3av1v2 ; 18.86v 2.5v10 1 2101aB201a B ; 3 4 w 5 - s0 1.5l 220v 550w 11.52090 C = 4.2103j /kg 215 Min 344wr2 20. 201312211- - 1. B ; ;u ; acd b 2. C - - 3. C - ;p =gh= 1.0103kg / m310n / kg61.0m = 6.1105pab; -c;w = pt = 1.6106kw24h X 3651.41011 kw; hd 4. Abd 37; 40w;5 1nm;50hz abd ; D ;abcdd abcFireWiredFireWire .cdd 6.D ; ; 0; d 7.D. A; ww;jd C; 8. D ;Oster a; b; c ; d 9.Bc 800wB1200wAB B.B 10.Bd ; ; a ; Bb; C ; c Dn d bd 11.10; 1.2105 1w = 2604.7kw; h-2603.5kw; h = 1.2kw; H; t = 24h5 = 120h= 0.01kw = 10w; 2100w = pt = 0.01kw110620h = 2105kw; h 0.6/ kw; hx21055kw; h = 1.2105 12.9 2.25 ass1rl i = i1 i2 =;ss1rbrl u = 9vrl =9rl9v;r ll 13. ; ; 14.1104 1104 0.1a100s 15.- p =rl = =12 p = i2r =2r = = w r =12p12 p; - 16.; r0rr0 r u = irp = ui r0rr0 Br i= r0; p = ui ; Br 17 16v 20w20.875w 7.1w3 1abcv10?3v 0.1vuv1 = 2vv20?15v0.5vuv2 = 6vu = uv2 = 6v; d0?0.6a0.02ai = 0.2a; u slip = uv2-uv1 = 6v-2v = 4v u slide= u-ul = 6v-2.5v = 3.5v pl = ulil = 2.5v0.35a = 0.875w 3 1; 2B; 3; 40.625; 5 1; 26v2.5v 3.5v B 3 ; 42.5v0.2 5ap = ui = 2.5v0.25a = 0.625w;5 6v 2.5v6v-2.5v = 3.5vu003e 3v0?15v 3.5v 19.4.41105j4.95105j1100 T2-t1= 4.2103j /kg;1.5kg90-20=